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Prof. dr. L. (Lex) Kaper

Faculteit der Natuurwetenschappen, Wiskunde en Informatica
Anton Pannekoek Institute of Astronomy
Fotograaf: Dirk Gillissen

Bezoekadres
  • Science Park 904
  • Kamernummer: C4.116
Postadres
  • Postbus 94249
    1090 GE Amsterdam
  • Biografie

    Vice Dean

    Prof.dr. Lex Kaper has been appointed as the vice dean and director of education at the Faculty of Science of the University of Amsterdam in 2019. 

    Profile

    Lex Kaper is full professor Observational Astrophysics and Instrument Development at the University of Amsterdam and adjunct professor Education in Astronomy at the VU University Amsterdam.  He obtained his PhD (cum laude) at the University of Amsterdam in 1993, and worked for four years at the Headquarters of the European Southern Observatory in Garching near Munich (Germany). He returned at the Anton Pannekoek Institute for Astronomy in 1998 with a Royal Academy fellowship. Kaper is the NL-PI of X-shooter, the most powerful spectrograph in the world, mounted on the ESO Very Large Telescope in 2009. He is the NL-PI of MOSAIC, the multi-object spectrograph for the ESO Extremely Large Telescope (2025), the biggest eye on the sky. Kaper is vice president of the European Astronomical Society.

    Research and teaching

    His research group works on the formation, evolution and fate of massive stars. Recent research highlights include the spectroscopic identification of young massive stars that are still on their way to become main-sequence stars, the spectroscopic exploration of massive stars in the Local Group and beyond, and the study of distant galaxies hosting gamma-ray bursts, the most powerful cosmic explosions. A key observation has been the detection of the optical counterpart of the gravitational wave source GW170817 caused by the merging event of two neutron stars. VLT/X-shooter spectra of the corresponding kilonova demonstrated that such events are the production sites of heavy elements such as the lanthanides. He has also been involved in searches for variations in the fundamental constants of nature. Kaper teaches the Master’s course Stellar Populations.

    Keywords 

    Massive stars, star formation, stellar evolution, gamma-ray bursts, spectroscopy

  • Publicaties

    2022

    • Brands, S. A., de Koter, A., Bestenlehner, J. M., Crowther, P. A., Sundqvist, J. O., Puls, J., Caballero-Nieves, S. M., Abdul-Masih, M., Driessen, F. A., García, M. G., Geen, S., Gräfener, G., Hawcroft, C., Kaper, L., Keszthelyi, Z., Langer, N., Sana, H., Schneider, F. R. N., Shenar, T., & Vink, J. S. (2022). The R136 star cluster dissected with Hubble Space Telescope/STIS. III: The most massive stars and their clumped winds. Astronomy & Astrophysics, 663, [A36]. https://doi.org/10.1051/0004-6361/202142742 [details]
    • Shepard, K., Gies, D. R., Kaper, L., & de Koter, A. (2022). Spectroscopic Line Modeling of the Fastest Rotating O-type Stars. Astrophysical Journal, 931, [931]. https://doi.org/10.3847/1538-4357/ac66e6 [details]

    2021

    2020

    • Ramírez-Tannus, M. C., Poorta, J., Bik, A., Kaper, L., de Koter, A., De Ridder, J., Beuther, H., Brandner, W., Davies, B., Gennaro, M., Guo, D., Henning, T., Linz, H., Naylor, T., Pasquali, A., Ramírez-Agudelo, O. H., & Sana, H. (2020). The young stellar content of the giant H II regions M 8, G333.6-0.2, and NGC 6357 with VLT/KMOS. Astronomy & Astrophysics, 633, [A155]. https://doi.org/10.1051/0004-6361/201935941 [details]
    • Shepard, K., Gies, D. R., Lester, K. V., Wang, L., Guo, Z., Kaper, L., De Koter, A., & Sana, H. (2020). HST/COS Spectra of the Wind Lines of VFTS 102 and 285. Astrophysical Journal, 888(2), [82]. https://doi.org/10.3847/1538-4357/ab5a82 [details]
    • van Gelder, M. L., Kaper, L., Japelj, J., Ramírez-Tannus, M. C., Ellerbroek, L. E., Barbá, R. H., Bestenlehner, J. M., Bik, A., Gräfener, G., de Koter, A., de Mink, S. E., Sabbi, E., Sana, H., Sewiło, M., Vink, J. S., & Walborn, N. R. (2020). VLT/X-shooter spectroscopy of massive young stellar objects in the 30 Doradus region of the Large Magellanic Cloud. Astronomy & Astrophysics, 636, [A54]. https://doi.org/10.1051/0004-6361/201936361 [details]

    2019

    • Bolmer, J., Ledoux, C., Wiseman, P., De Cia, A., Selsing, J., Schady, P., ... Zafar, T. (2019). Evidence for diffuse molecular gas and dust in the hearts of gamma-ray burst host galaxies: Unveiling the nature of high-redshift damped Lyman-α systems. Astronomy & Astrophysics, 623, [A43]. https://doi.org/10.1051/0004-6361/201834422 [details]
    • Gorgone, N. M., Kouveliotou, C., Negoro, H., Wijers, R. A. M. J., Bozzo, E., Guiriec, S., ... Younes, G. A. (2019). Discovery and Identification of MAXI J1621-501 as a Type I X-Ray Burster with a Super-orbital Period. Astrophysical Journal, 884(2), [168]. https://doi.org/10.3847/1538-4357/ab3e43 [details]
    • Heintz, K. E., Bolmer, J., Ledoux, C., Noterdaeme, P., Krogager, J-K., Fynbo, J. P. U., Jakobsson, P., Covino, S., D'Elia, V., De Pasquale, M., Hartmann, D. H., Izzo, L., Japelj, J., Kann, D. A., Kaper, L., Petitjean, P., Rossi, A., Salvaterra, R., Schady, P., ... Zafar, T. (2019). New constraints on the physical conditions in H2-bearing GRB-host damped Lyman-α absorbers. Astronomy & Astrophysics, 629, [A131]. https://doi.org/10.1051/0004-6361/201936250 [details]
    • Heintz, K. E., Ledoux, C., Fynbo, J. P. U., Jakobsson, P., Noterdaeme, P., Krogager, J-K., ... Kaper, L. (2019). Cold gas in the early Universe: Survey for neutral atomic-carbon in GRB host galaxies at 1 < z< 6 from optical afterglow spectroscopy. Astronomy & Astrophysics, 621, [A20]. https://doi.org/10.1051/0004-6361/201834246 [details]
    • Heintz, K. E., Zafar, T., De Cia, A., Vergani, S. D., Jakobsson, P., Fynbo, J. P. U., ... Andersen, A. C. (2019). On the dust properties of high-redshift molecular clouds and the connection to the 2175 Å extinction bump. Monthly Notices of the Royal Astronomical Society, 486(2), 2063-2074. https://doi.org/10.1093/mnras/stz1012 [details]
    • Izzo, L., de Ugarte Postigo, A., Maeda, K., Thöne, C. C., Kann, D. A., Della Valle, M., Sagues Carracedo, A., Michałowski, M. J., Schady, P., Schmidl, S., Selsing, J., Starling, R. L. C., Suzuki, A., Bensch, K., Bolmer, J., Campana, S., Cano, Z., Covino, S., Fynbo, J. P. U., ... Wiersema, K. (2019). Signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst. Nature, 565(7739), 324-327. https://doi.org/10.1038/s41586-018-0826-3 [details]
    • Japelj, J., Laigle, C., Puech, M., Pichon, C., Rahmani, H., Dubois, Y., ... Yang, Y. (2019). Simulating MOS science on the ELT: Lyα forest tomography. Astronomy & Astrophysics, 632, [A94]. https://doi.org/10.1051/0004-6361/201936048 [details]
    • Rouco Escorial, A., Wijnands, R., Ootes, L. S., Degenaar, N., Snelders, M., Kaper, L., ... Homan, J. (2019). Quiescent X-ray variability in the neutron star Be/X-ray transient GRO J1750-27. Astronomy & Astrophysics, 630, [A105]. https://doi.org/10.1051/0004-6361/201834327 [details]
    • Selsing, J., Malesani, D., Goldoni, P., Fynbo, J. P. U., Krühler, T., Antonelli, L. A., ... Zafar, T. (2019). The X-shooter GRB afterglow legacy sample (XS-GRB). Astronomy & Astrophysics, 623, [A92]. https://doi.org/10.1051/0004-6361/201832835 [details]
    • Tanvir, N. R., Fynbo, J. P. U., de Ugarte Postigo, A., Japelj, J., Wiersema, K., Malesani, D., ... Xu, D. (2019). The fraction of ionizing radiation from massive stars that escapes to the intergalactic medium. Monthly Notices of the Royal Astronomical Society, 483(4), 5380-5408. https://doi.org/10.1093/mnras/sty3460 [details]

    2018

    • Heintz, K. E., Malesani, D., Wiersema, K., Jakobsson, P., Fynbo, J. P. U., Savaglio, S., ... Watson, D. (2018). The luminous, massive and solar metallicity galaxy hosting the Swift γ-ray burst GRB 160804A at z = 0.737. Monthly Notices of the Royal Astronomical Society, 474(2), 2738-2749. https://doi.org/10.1093/mnras/stx2895 [details]
    • Heintz, K. E., Watson, D., Jakobsson, P., Fynbo, J. P. U., Bolmer, J., Arabsalmani, M., Cano, Z., Covino, S., D'Elia, V., Gomboc, A., Japelj, J., Kaper, L., Krogager, J-K., Pugliese, G., Sánchez-Ramírez, R., Selsing, J., Sparre, M., Tanvir, N. R., Thöne, C. C., ... Vergani, S. D. (2018). Highly ionized metals as probes of the circumburst gas in the natal regions of gamma-ray bursts. Monthly Notices of the Royal Astronomical Society, 479(3), 3456-3476. https://doi.org/10.1093/mnras/sty1447 [details]
    • Hernandez, S., Larsen, S., Trager, S., Kaper, L., & Groot, P. (2018). Chemical abundances of globular clusters in NGC 5128 (Centaurus A). Monthly Notices of the Royal Astronomical Society, 476(4), 5189-5215. https://doi.org/10.1093/mnras/sty519 [details]
    • Hernandez, S., Larsen, S., Trager, S., Kaper, L., & Groot, P. (2018). Metallicities of young massive clusters in NGC 5236 (M83). Monthly Notices of the Royal Astronomical Society, 473(1), 826-837. https://doi.org/10.1093/mnras/stx2397 [details]
    • Japelj, J., Vergani, S. D., Salvaterra, R., Renzo, M., Zapartas, E., de Mink, S. E., ... Zibetti, S. (2018). Host galaxies of SNe Ic-BL with and without long gamma-ray bursts. Astronomy & Astrophysics, 617, [A105]. https://doi.org/10.1051/0004-6361/201833209 [details]
    • Oostrum, L. C., Ochsendorf, B. B., Kaper, L., & Tielens, A. G. G. M. (2018). Unidentified emission features in the R Coronae Borealis star V854 Centauri. Astronomy & Astrophysics, 610, [L6]. https://doi.org/10.1051/0004-6361/201731549 [details]
    • Ramírez-Tannus, M. C., Cox, N. L. J., Kaper, L., & de Koter, A. (2018). Diffuse interstellar bands in the H II region M17: Insights into their relation with the total-to-selective visual extinction Rv. Astronomy & Astrophysics, 620, [A52]. https://doi.org/10.1051/0004-6361/201833340 [details]
    • Selsing, J., Krühler, T., Malesani, D., D'Avanzo, P., Schulze, S., Vergani, S. D., ... Wiersema, K. (2018). The host galaxy of the short GRB 111117A at z = 2.211: Impact on the short GRB redshift distribution and progenitor channels. Astronomy & Astrophysics, 616, [A48]. https://doi.org/10.1051/0004-6361/201731475 [details]
    • Tanvir, N. R., Laskar, T., Levan, A. J., Perley, D. A., Zabl, J., Fynbo, J. P. U., ... Xu, D. (2018). The Properties of GRB 120923A at a Spectroscopic Redshift of z ≈ 7.8. Astrophysical Journal, 865(2), [107]. https://doi.org/10.3847/1538-4357/aadba9 [details]
    • Zafar, T., Heintz, K. E., Fynbo, J. P. U., Malesani, D., Bolmer, J., Ledoux, C., Arabsalmani, M., Kaper, L., Campana, S., Starling, R. L. C., Selsing, J., Kann, D. A., de Ugarte Postigo, A., Schweyer, T., Christensen, L., Møller, P., Japelj, J., Perley, D., Tanvir, N. R., ... Xu, D. (2018). The 2175 Å Extinction Feature in the Optical Afterglow Spectrum of GRB 180325A at z = 2.25*. Astrophysical Journal Letters, 860(2), [L21]. https://doi.org/10.3847/2041-8213/aaca3f [details]

    2017

    • Christensen, L., Vergani, S. D., Schulze, S., Annau, N., Selsing, J., Fynbo, J. P. U., de Ugarte Postigo, A., Cañameras, R., Lopez, S., Passi, D., Cortés-Zuleta, P., Ellison, S. L., D'Odorico, V., Becker, G., Berg, T. A. M., Cano, Z., Covino, S., Cupani, G., D'Elia, V., ... Worseck, G. (2017). Solving the conundrum of intervening strong Mg II absorbers towards gamma-ray bursts and quasars. Astronomy & Astrophysics, 608, [A84]. https://doi.org/10.1051/0004-6361/201731382 [details]
    • Covino, S., Wiersema, K., Fan, Y. Z., Toma, K., Higgins, A. B., Melandri, A., D'Avanzo, P., Mundell, C. G., Palazzi, E., Tanvir, N. R., Bernardini, M. G., Branchesi, M., Brocato, E., Campana, S., di Serego Alighieri, S., Götz, D., Fynbo, J. P. U., Gao, W., Gomboc, A., ... Wijers, R. A. M. J. (2017). The unpolarized macronova associated with the gravitational wave event GW 170817. Nature Astronomy, 1(11), 791-794. https://doi.org/10.1038/s41550-017-0285-z [details]
    • Cox, N. L. J., Cami, J., Farhang, A., Smoker, J., Monreal-Ibero, A., Lallement, R., Sarre, P. J., Marshall, C. C. M., Smith, K. T., Evans, C. J., Royer, P., Linnartz, H., Cordiner, M. A., Joblin, C., van Loon, J. T., Foing, B. H., Bhatt, N. H., Bron, E., Elyajouri, M., ... Spaans, M. (2017). The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) . I. Project description, survey sample, and quality assessment. Astronomy & Astrophysics, 606, [A76]. https://doi.org/10.1051/0004-6361/201730912 [details]
    • Hernandez, S., Larsen, S., Trager, S., Groot, P., & Kaper, L. (2017). Chemical abundances of two extragalactic young massive clusters. Astronomy & Astrophysics, 603, [A119]. https://doi.org/10.1051/0004-6361/201730550 [details]
    • Hyde, E. A., Russell, D. M., Ritter, A., Filipović, M. D., Kaper, L., Grieve, K., & O'Brien, A. N. (2017). LMC X-1: A New Spectral Analysis of the O-star in the Binary and Surrounding Nebula. Publications of the Astronomical Society of the Pacific, 129(979), [94201]. https://doi.org/10.1088/1538-3873/aa7407 [details]
    • LIGO Scientific Collaboration and Virgo Collaboration, Fermi GBM, INTEGRAL, Icecube Collaboration, AstroSat Cadmium Zinc Telluride Imager Team, IPN Collaboration, The Insight-HXMT Collaboration, ANTARES Collaboration, The SWIFT Collaboration, AGILE Team, The 1M2H Team, The Dark Energy Camera GW-EM Collaboration and the DES Collaboration, The DLT40 Collaboration, The GRAvitational Wave Inaf TeAm (GRAWITA), The Fermi Large Area Telescope Collaboration, ATCA: Australia Telescope Compact Array, ASKAP: Australian SKA Pathfinder, Las Cumbres Observatory Group, OzGrav, ... SKA South Africa/MeerKAT (2017). Multi-messenger Observations of a Binary Neutron Star Merger. Astrophysical Journal Letters, 848(2), [L12]. https://doi.org/10.3847/2041-8213/aa91c9 [details]
    • Ramírez-Tannus, M. C., Kaper, L., de Koter, A., Tramper, F., Bik, A., Ellerbroek, L. E., Ochsendorf, B. B., Ramírez-Agudelo, O. H., & Sana, H. (2017). Massive pre-main-sequence stars in M17. Astronomy & Astrophysics, 604, [A78]. https://doi.org/10.1051/0004-6361/201629503 [details]
    • Sana, H., Ramírez-Tannus, M. C., de Koter, A., Kaper, L., Tramper, F., & Bik, A. (2017). A dearth of short-period massive binaries in the young massive star forming region M 17: Evidence for a large orbital separation at birth? Astronomy & Astrophysics, 599, [L9]. https://doi.org/10.1051/0004-6361/201630087 [details]
    • Wehres, N., Ochsendorf, B. B., Tielens, A. G. G. M., Cox, N. L. J., Kaper, L., Bally, J., & Snow, T. P. (2017). Medium-resolution échelle spectroscopy of the Red Square Nebula, MWC 922. Astronomy & Astrophysics, 601, [A69]. https://doi.org/10.1051/0004-6361/201628723 [details]

    2016

    • Ubachs, W., Bagdonaite, J., Salumbides, E. J., Murphy, M. T., & Kaper, L. (2016). Colloquium: Search for a drifting proton-electron mass ratio from H2. Reviews of Modern Physics, 88(2), [21003]. https://doi.org/10.1103/RevModPhys.88.021003 [details]
    • Wade, G. A., Neiner, C., Alecian, E., Grunhut, J. H., Petit, V., Batz, B. D., Bohlender, D. A., Cohen, D. H., Henrichs, H. F., Kochukhov, O., Landstreet, J. D., Manset, N., Martins, F., Mathis, S., Oksala, M. E., Owocki, S. P., Rivinius, T., Shultz, M. E., Sundqvist, J. O., ... Yakunin, I. (2016). The MiMeS survey of magnetism in massive stars: introduction and overview. Monthly Notices of the Royal Astronomical Society, 456(1), 2-22. https://doi.org/10.1093/mnras/stv2568 [details]

    2015

    2014

    • Cirasuolo, M., et al., U., Kaper, L., & Lemasle, B. (2014). MOONS: the Multi-Object Optical and Near-infrared Spectrograph for the VLT. Proceedings of SPIE, the International Society for Optical Engineering, 9147, 0N. https://doi.org/10.1117/12.2056012 [details]
    • Cox, N. L. J., Cami, J., Kaper, L., Ehrenfreund, P., Foing, B. H., Ochsendorf, B. B., ... Salama, F. (2014). VLT/X-Shooter survey of near-infrared diffuse interstellar bands. Astronomy & Astrophysics, 569, A117. https://doi.org/10.1051/0004-6361/201323061 [details]
    • D'Elia, V., Fynbo, J. P. U., Goldoni, P., Covino, S., de Ugarte Postigo, A., Ledoux, C., ... Xu, D. (2014). VLT/X-shooter spectroscopy of the GRB 120327A afterglow. Astronomy & Astrophysics, 564, A38. https://doi.org/10.1051/0004-6361/201323057 [details]
    • Ellerbroek, L. E., Podio, L., Dougados, C., Cabrit, S., Sitko, M. L., Sana, H., ... Grindlay, J. (2014). Relating jet structure to photometric variability: the Herbig Ae star HD 163296. Astronomy & Astrophysics, 563, A87. https://doi.org/10.1051/0004-6361/201323092 [details]
    • Evans, C. J., Puech, M., Barbuy, B., Bonifacio, P., Cuby, J. G., Guenther, E., ... Ziegler, B. (2014). Science case and requirements for the MOSAIC concept for a multi-object spectrograph for the European Extremely Large Telescope. Proceedings of SPIE, the International Society for Optical Engineering, 9147, 96. https://doi.org/10.1117/12.2055857 [details]
    • Fynbo, J. P. U., Krühler, T., Leighly, K., Ledoux, C., Vreeswijk, P. M., Schulze, S., ... Zafar, T. (2014). The mysterious optical afterglow spectrum of GRB 140506A at z = 0.889. Astronomy & Astrophysics, 572, [A12]. https://doi.org/10.1051/0004-6361/201424726 [details]
    • Hammer, F., Barbuy, B., Cuby, J. G., Kaper, L., Morris, S., Evans, C. J., ... Disseau, K. (2014). MOSAIC at the E-ELT: A multi-object spectrograph for astrophysics, IGM and cosmology. Proceedings of SPIE, the International Society for Optical Engineering, 9147, 27. https://doi.org/10.1117/12.2055148 [details]
    • Levan, A. J., Tanvir, N. R., Starling, R. L. C., Wiersema, K., Page, K. L., Perley, D. A., ... Zauderer, B. A. (2014). A New Population of Ultra-long Duration Gamma-Ray Bursts. Astrophysical Journal, 781(1), [13]. https://doi.org/10.1088/0004-637X/781/1/13 [details]
    • Meyer, DM-A., Mackey, J., Langer, N., Gvaramadze, V. V., Mignone, A., Izzard, R. G., & Kaper, L. (2014). Models of the circumstellar medium of evolving, massive runaway stars moving through the Galactic plane. Monthly Notices of the Royal Astronomical Society, 444(3), 2754-2775. https://doi.org/10.1093/mnras/stu1629 [details]
    • Ochsendorf, B. B., Cox, N. L. J., Krijt, S., Salgado, F., Berné, O., Bernard, J. P., ... Tielens, A. G. G. M. (2014). Blowing in the wind: The dust wave around σ Orionis AB. Astronomy & Astrophysics, 563, A65. https://doi.org/10.1051/0004-6361/201322873 [details]
    • Ochsendorf, B. B., Verdolini, S., Cox, N. L. J., Berné, O., Kaper, L., & Tielens, A. G. G. M. (2014). Radiation-pressure-driven dust waves inside bursting interstellar bubbles. Astronomy & Astrophysics, 566, A75. https://doi.org/10.1051/0004-6361/201423545 [details]
    • Pita, S., Goldoni, P., Boisson, C., Lenain, J-P., Punch, M., Gérard, L., ... Sol, H. (2014). Spectroscopy of high-energy BL Lacertae objects with X-shooter on the VLT. Astronomy & Astrophysics, 565, A12. https://doi.org/10.1051/0004-6361/201323071 [details]
    • Schulze, S., et al., U., Ellerbroek, L. E., Kaper, L., & Hartoog, O. E. (2014). GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts. Astronomy & Astrophysics, 566, A102. https://doi.org/10.1051/0004-6361/201423387 [details]
    • Sparre, M., Hartoog, O. E., Krühler, T., Fynbo, J. P. U., Watson, D. J., Wiersema, K., ... Wijers, R. A. M. J. (2014). The Metallicity and Dust Content of a Redshift 5 Gamma-Ray Burst Host Galaxy. Astrophysical Journal, 785(2), 150. https://doi.org/10.1088/0004-637X/785/2/150 [details]
    • Tramper, F., Sana, H., de Koter, A., Kaper, L., & Ramírez-Agudelo, O. H. (2014). The properties of ten O-type stars in the low-metallicity galaxies IC 1613, WLM, and NGC 3109. Astronomy & Astrophysics, 572, [A36]. https://doi.org/10.1051/0004-6361/201424312 [details]
    • de Ugarte Postigo, A., Thöne, C. C., Rowlinson, A., García-Benito, R., Levan, A. J., Gorosabel, J., ... Wijers, R. A. M. J. (2014). Spectroscopy of the short-hard GRB 130603B: The host galaxy and environment of a compact object merger. Astronomy & Astrophysics, 563, [A62]. https://doi.org/10.1051/0004-6361/201322985 [details]

    2013

    • Boley, P. A., Linz, H., van Boekel, R., Henning, T., Feldt, M., Kaper, L., Leinert, C., Müller, A., Pascucci, I., Robberto, M., Stecklum, B., Waters, L. B. F. M., & Zinnecker, H. (2013). The VLTI/MIDI survey of massive young stellar objects: Sounding the inner regions around intermediate- and high-mass young stars using mid-infrared interferometry. Astronomy & Astrophysics, 558, [A24]. https://doi.org/10.1051/0004-6361/201321539 [details]
    • Ellerbroek, L. E., Bik, A., Kaper, L., Maaskant, K. M., Paalvast, M., Tramper, F., ... Balog, Z. (2013). RCW36: characterizing the outcome of massive star formation. Astronomy & Astrophysics, 558, A102. https://doi.org/10.1051/0004-6361/201321752 [details]
    • Ellerbroek, L. E., Podio, L., Kaper, L., Sana, H., Huppenkothen, D., de Koter, A., & Monaco, L. (2013). The outflow history of two Herbig-Haro jets in RCW 36: HH 1042 and HH 1043. Astronomy & Astrophysics, 551, 5. https://doi.org/10.1051/0004-6361/201220635 [details]
    • Hartoog, O. E., Wiersema, K., Vreeswijk, P. M., Kaper, L., Tanvir, N. R., Savaglio, S., ... Wijers, R. A. M. J. (2013). The host-galaxy response to the afterglow of GRB 100901A. Monthly Notices of the Royal Astronomical Society, 430(4), 2739-2754. https://doi.org/10.1093/mnras/stt078 [details]
    • Henrichs, H. F., de Jong, J. A., Verdugo, E., Schnerr, R. S., Neiner, C., Donati, J-F., ... Rygl, K. L. J. (2013). Discovery of the magnetic field in the pulsating B star β Cephei. Astronomy & Astrophysics, 555, A46. https://doi.org/10.1051/0004-6361/201321584 [details]
    • Krühler, T., Ledoux, C., Fynbo, J. P. U., Vreeswijk, P. M., Schmidl, S., Malesani, D., Christensen, L., De Cia, A., Hjorth, J., Jakobsson, P., Kann, D. A., Kaper, L., Vergani, S. D., Afonso, P. M. J., Covino, S., de Ugarte Postigo, A., D'Elia, V., Filgas, R., Goldoni, P., ... Xu, D. (2013). Molecular hydrogen in the damped Lyman α system towards GRB 120815A at z = 2.36. Astronomy & Astrophysics, 557, [A18]. https://doi.org/10.1051/0004-6361/201321772 [details]
    • Lemasle, B., François, P., Genovali, K., Kovtyukh, V. V., Bono, G., Inno, L., ... Romaniello, M. (2013). Galactic abundance gradients from Cepheids. α and heavy elements in the outer disk. Astronomy & Astrophysics, 558, A31. https://doi.org/10.1051/0004-6361/201322115 [details]
    • Sana, H., van Boeckel, T., Tramper, F., Ellerbroek, L. E., de Koter, A., Kaper, L., ... Gies, D. R. (2013). R144 revealed as a double-lined spectroscopic binary. Monthly Notices of the Royal Astronomical Society. Letters, 432(1), L26-L30. https://doi.org/10.1093/mnrasl/slt029 [details]
    • Starkenburg, E., Hill, V., Tolstoy, E., François, P., Irwin, M. J., Boschman, L., ... Kaper, L. (2013). The extremely low-metallicity tail of the Sculptor dwarf spheroidal galaxy. Astronomy & Astrophysics, 549, A88. https://doi.org/10.1051/0004-6361/201220349 [details]
    • Thöne, C. C., Fynbo, J. P. U., Goldoni, P., Postigo de Ugarte, A., Campana, S., Vergani, S. D., Covino, S., Krühler, T., Kaper, L., Tanvir, N., Zafar, T., D'Elia, V., Gorosabel, J., Groot, P., Hammer, F., Jakobsson, P., Klose, S., Levan, A. J., Milvang-Jensen, B., ... Wijers, R. A. M. J. (2013). GRB 100219A with X-shooter - abundances in a galaxy at z =4.7. Monthly Notices of the Royal Astronomical Society, 428(4), 3590-3606. https://doi.org/10.1093/mnras/sts303 [details]
    • Tramper, F., Gräfener, G., Hartoog, O., Sana, H., de Koter, A., Vink, J. S., Ellerbroek, L. E., Langer, N., Garcia, M., Kaper, L., & de Mink, S. E. (2013). On the nature of WO stars: a quantitative analysis of the WO3 star DR1 in IC 1613. Astronomy & Astrophysics, 559, [A72]. https://doi.org/10.1051/0004-6361/201322155 [details]
    • Xu, D., de Ugarte Postigo, A., Leloudas, G., Krühler, T., Cano, Z., Hjorth, J., ... Zou, Y. C. (2013). Discovery of the Broad-lined Type Ic SN 2013cq Associated with the Very Energetic GRB 130427A. Astrophysical Journal, 776(2), 98. https://doi.org/10.1088/0004-637X/776/2/98 [details]

    2012

    • Bagdonaite, J., Murphy, M. T., Kaper, L., & Ubachs, W. (2012). Constraint on a variation of the proton-to-electron mass ratio from H2 absorption towards quasar Q2348-011. Monthly Notices of the Royal Astronomical Society, 421(1), 419-425. https://doi.org/10.1111/j.1365-2966.2011.20319.x [details]
    • Bufano, F., Pian, E., Sollerman, J., Benetti, S., Pignata, G., Valenti, S., ... Wijers, R. A. M. J. (2012). The Highly Energetic Expansion of SN 2010bh Associated with GRB 100316D. Astrophysical Journal, 753(1), 67. https://doi.org/10.1088/0004-637X/753/1/67 [details]
    • Cirasuolo, M., Afonso, J., Bender, R., Bonifacio, P., Evans, C., Kaper, L., ... Wright, G. (2012). MOONS: a multi-object optical and near-infrared spectrograph for the VLT. Proceedings of SPIE, the International Society for Optical Engineering, 8446, 0S. https://doi.org/10.1117/12.925871 [details]
    • Evans, C. J., Barbuy, B., Bonifacio, P., Chemla, F., Cuby, J. G., Dalton, G. B., ... Yang, Y. (2012). Multi-object spectroscopy with the European ELT: scientific synergies between EAGLE and EVE. Proceedings of SPIE, the International Society for Optical Engineering, 8446, 7K. https://doi.org/10.1117/12.924819 [details]
    • Grunhut, J. H., Wade, G. A., Sundqvist, J. O., ud-Doula, A., Neiner, C., Ignace, R., ... Ubaud, S. (2012). Investigating the spectroscopic, magnetic and circumstellar variability of the O9 subgiant star HD 57682. Monthly Notices of the Royal Astronomical Society, 426(3), 2208-2227. https://doi.org/10.1111/j.1365-2966.2012.21799.x [details]
    • Hartoog, O. E., Sana, H., de Koter, A., & Kaper, L. (2012). First Very Large Telescope/X-shooter spectroscopy of early-type stars outside the Local Group. Monthly Notices of the Royal Astronomical Society, 422(1), 367-378. https://doi.org/10.1111/j.1365-2966.2012.20615.x [details]
    • Kaur, R., Kaper, L., Ellerbroek, L. E., Russell, D. M., Altamirano, D., Wijnands, R., ... Kuulkers, E. (2012). Very large telescope/X-shooter spectroscopy of the candidate black hole X-ray binary MAXI J1659-152 in outburst. Astrophysical Journal Letters, 746(2), L23. https://doi.org/10.1088/2041-8205/746/2/L23 [details]
    • Oliva, E., Diolaiti, E., Garilli, B., Gratton, R., Lorenzetti, D., Schipani, P., Scuderi, S., Vanzella, E., Cirasuolo, M., Afonso, J., Bender, R., Bonifacio, P., Kaper, L., Vanzi, L., Baffa, C., Bianco, A., Bonoli, C., Bortoletto, F., Bruno, P., ... Vitali, F. (2012). The design of the MOONS-VLT spectrometer. Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 8446, 187. https://doi.org/10.1117/12.925309 [details]
    • Wiersema, K., Curran, P., Krühler, T., Melandri, A., Rol, E., Starling, R. L. C., Tanvir, N. R., van der Horst, A. J., Covino, S., Fynbo, J. P. U., Goldoni, P., Gorosabel, J., Hjorth, J., Klose, S., Mundell, C. G., O'Brien, P. T., Palazzi, E., Wijers, R. A. M. J., D'Elia, V., ... Vergani, S. D. (2012). Detailed optical and near-infrared polarimetry, spectroscopy and broad-band photometry of the afterglow of GRB 091018: polarization evolution. Monthly Notices of the Royal Astronomical Society, 426(1), 2-22. https://doi.org/10.1111/j.1365-2966.2012.20943.x [details]
    • van der Horst, A. J., Kouveliotou, C., Gorgone, N. M., Kaneko, Y., Baring, M. G., Guiriec, S., ... Wijers, R. A. M. J. (2012). SGR J1550-5418 Bursts Detected with the Fermi Gamma-Ray Burst Monitor during its Most Prolific Activity. Astrophysical Journal, 749(2), [122]. https://doi.org/10.1088/0004-637X/749/2/122 [details]

    2011

    • Ellerbroek, L., Kaper, L., Bik, A., de Koter, A., Horrobin, M., Puga, E., ... Waters, L. B. F. M. (2011). The Intermediate-mass Young Stellar Object 08576nr292: discovery of a disk-jet system. Astrophysical Journal Letters, 732. https://doi.org/10.1088/2041-8205/732/1/L9 [details]
    • Fynbo, J. P. U., Ledoux, C., Noterdaeme, P., Christensen, L., Møller, P., Durgapal, A. K., ... Zafar, T. (2011). Galaxy counterparts of metal-rich damped Lyα absorbers: II. A solar-metallicity and dusty DLA at zabs= 2.58. Monthly Notices of the Royal Astronomical Society, 413, 2481-2488. https://doi.org/10.1111/j.1365-2966.2011.18318.x [details]
    • Kaper, L., Ellerbroek, L. E., Ochsendorf, B. B., & Caballero Pouroutidou, R. N. (2011). Studying the formation of massive stars with VLT/X-shooter. Astronomische Nachrichten, 332(3), 232-237. https://doi.org/10.1002/asna.201111524 [details]
    • Lin, L., Kouveliotou, C., Baring, M. G., van der Horst, A. J., Guiriec, S., Woods, P. M., ... Wilson-Hodge, C. (2011). Fermi/Gamma-ray burst monitor observations of SGR J0501+4516 bursts. Astrophysical Journal, 739(2). https://doi.org/10.1088/0004-637X/739/2/87 [details]
    • Maaskant, K. M., Bik, A., Waters, L. B. F. M., Kaper, L., Henning, T., Puga, E., ... Kainulainen, J. (2011). Sequential star formation in IRAS 06084-0611 (GGD 12-15): from intermediate-mass to high-mass stars. Astronomy & Astrophysics, 531. https://doi.org/10.1051/0004-6361/201116743 [details]
    • Ochsendorf, B. B., Ellerbroek, L. E., Chini, R., Hartoog, O. E., Hoffmeister, V., Waters, L. B. F. M., & Kaper, L. (2011). First firm spectral classification of an early-B pre-main-sequence star: B275 in M 17. Astronomy & Astrophysics, 536. https://doi.org/10.1051/0004-6361/201118089 [details]
    • Sande, J., Kriek, M., Franx, M., Dokkum, P. G., Bezanson, R., Whitaker, K. E., ... Kaper, L. (2011). The stellar velocity dispersion of a compact massive galaxy at z = 1.80 using X-Shooter: confirmation of the evolution in the mass-size and mass-dispersion relations. Astrophysical Journal Letters, 736. https://doi.org/10.1088/2041-8205/736/1/L9 [details]
    • Sparre, M., Sollerman, J., Fynbo, J. P. U., Malesani, D., Goldoni, P., de Ugarte Postigo, A., ... Wijers, R. A. M. J. (2011). Spectroscopic evidence for SN 2010ma associated with GRB 101219B. Astrophysical Journal Letters, 735. https://doi.org/10.1088/2041-8205/735/1/L24 [details]
    • Starling, R. L. C., Wiersema, K., Levan, A. J., Sakamoto, T., Bersier, D., Goldoni, P., ... Woosley, S. E. (2011). Discovery of the nearby long, soft GRB 100316D with an associated supernova. Monthly Notices of the Royal Astronomical Society, 411(4), 2792-2803. https://doi.org/10.1111/j.1365-2966.2010.17879.x [details]
    • Taylor, W. D., Evans, C. J., Sana, H. A. A., Walborn, N. R., de Mink, S. E., Stroud, V. E., Alvarez-Candal, A., Barbá, R. H., Bestenlehner, J. M., Bonanos, A. Z., Brott, I., Crowther, P. A., de Koter, A., Friedrich, K., Gräfener, G., Hénault-Brunet, V., Herrero, A., Kaper, L., Langer, N., ... Vink, J. S. (2011). The VLT-FLAMES Tarantula Survey: II. R139 revealed as a massive binary system. Astronomy & Astrophysics, 530. https://doi.org/10.1051/0004-6361/201116785 [details]
    • Tramper, F., Sana, H., de Koter, A., & Kaper, L. (2011). On the mass-loss rate of massive stars in the low-metallicity galaxies IC 1613, WLM, and NGC 3109. Astrophysical Journal Letters, 741. https://doi.org/10.1088/2041-8205/741/1/L8 [details]
    • Vergani, S. D., Flores, H., Covino, S., Fugazza, D., Gorosabel, J., Levan, A. J., ... Wijers, R. A. M. J. (2011). GRB 091127/SN 2009nz and the VLT/X-shooter spectroscopy of its host galaxy: probing the faint end of the mass-metallicity relation. Astronomy & Astrophysics, 535. https://doi.org/10.1051/0004-6361/201117726 [details]
    • Vernet, J., Dekker, H., D'Odorico, S., Kaper, L., Kjaergaard, P., Hammer, F., ... Zacchei, A. (2011). X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope. Astronomy & Astrophysics, 536. https://doi.org/10.1051/0004-6361/201117752 [details]
    • Vos, D. A. I., Cox, N. L. J., Kaper, L., Spaans, M., & Ehrenfreund, P. (2011). Diffuse interstellar bands in Upper Scorpius: probing variations in the DIB spectrum due to changing environmental conditions. Astronomy & Astrophysics, 533. https://doi.org/10.1051/0004-6361/200809746 [details]
    • van Weerdenburg, F., Murphy, M. T., Malec, A. L., Kaper, L., & Ubachs, W. (2011). First constraint on cosmological variation of the proton-to-electron mass ratio from two independent telescopes. Physical Review Letters, 106. https://doi.org/10.1103/PhysRevLett.106.180802 [details]

    2010

    • Bik, A., Puga, E., Waters, L. B. F. M., Horrobin, M., Henning, T., Vasyunina, T., Beuther, H., Linz, H., Kaper, L., van den Ancker, M., Lenorzer, A., Churchwell, E., Kurtz, S., Kouwenhoven, M. B. N., Stolte, A., de Koter, A., Thi, W. F., Comerón, F., & Waelkens, C. (2010). Sequential star formation in RCW 34: a spectroscopic census of the stellar content of high-mass star-forming regions. Astrophysical Journal, 713(2), 883-899. https://doi.org/10.1088/0004-637X/713/2/883 [details]
    • D'Elia, V., Fynbo, J. P. U., Covino, S., Goldoni, P., Jakobsson, P., Matteucci, F., ... Tanvir, N. R. (2010). VLT/X-shooter spectroscopy of the GRB 090926A afterglow. Astronomy & Astrophysics, 523, A36. https://doi.org/10.1051/0004-6361/201015216 [details]
    • Fynbo, J. P. U., Laursen, P., Ledoux, C., Møller, P., Durgapal, A. K., Goldoni, P., ... Zafar, T. (2010). Galaxy counterparts of metal-rich damped Lyα absorbers - I. The case of the z= 2.35 DLA towards Q 2222−0946. Monthly Notices of the Royal Astronomical Society, 408(4), 2128-2136. https://doi.org/10.1111/j.1365-2966.2010.17294.x [details]
    • Hammer, F., Kaper, L., & Dalton, G. (2010). OPTIMOS-EVE: a fibre-fed optical-near-infrared multi-object spectrograph for the E-ELT. The Messenger, (140), 36-37. [details]
    • Malec, A. L., Buning, R., Murphy, M. T., Milutinovic, N., Ellison, S. L., Prochaska, J. X., Kaper, L., Tumlinson, J., Carswell, R. F., & Ubachs, W. (2010). Keck telescope constraint on cosmological variation of the proton-to-electron mass ratio. Monthly Notices of the Royal Astronomical Society, 403(3), 1541-1555. https://doi.org/10.1111/j.1365-2966.2009.16227.x [details]
    • de Ugarte Postigo, A., Goldoni, P., Thöne, C. C., Vergani, S. D., D'Elia, V., Piranomonte, S., ... Vernet, J. (2010). GRB 090313: X-shooter's first shot at a gamma-ray burst. Astronomy & Astrophysics, 513, A42. https://doi.org/10.1051/0004-6361/200913113 [details]

    2009

    • Caballero-Nieves, S. M., Gies, D. R., Bolton, C. T., Hadrava, P., Herrero, A., Hillwig, T. C., ... McSwain, M. V. (2009). The ultraviolet spectrum and physical properties of the mass donor star in HD 226868 = Cygnus X-1. Astrophysical Journal, 701(2), 1895-1905. https://doi.org/10.1088/0004-637X/701/2/1895 [details]
    • Kaper, L., D'Odorico, S., Hammer, F., Pallavicini, R., Kjaergaard Rasmussen, P., Dekker, H., Francois, P., Goldoni, P., Guinouard, I., Groot, P. J., Hjorth, J., Horrobin, M., Navarro, R., Royer, F., Santin, P., Vernet, J., & Zerbi, F. (2009). X-shooter: A medium-resolution, wide-band spectrograph for the VLT. In A. Moorwood (Ed.), Science with the VLT in the ELT Era (pp. 319-324). (Astrophysics and Space Science Proceedings). Springer. https://doi.org/10.1007/978-1-4020-9190-2_53 [details]
    • Kouwenhoven, M. B. N., Brown, A. G. A., Goodwin, S. P., Portegies Zwart, S. F., & Kaper, L. (2009). Exploring the consequences of pairing algorithms for binary stars. Astronomy & Astrophysics, 493(3), 979-1016. https://doi.org/10.1051/0004-6361:200810234 [details]

    2008

    • Bik, A., Kaper, L., Hanson, M. M., & Waters, L. B. F. M. (2008). K-band spectroscopy of deeply embedded, young OB stars. In A. de Koter, L. J. Smith, & L. B. F. M. Waters (Eds.), Mass Loss from Stars and the Evolution of Stellar Clusters: proceedings of a workshop held at Lunteren, the Netherlands, 29 May-1 June 2006 (pp. 143-144). (Astronomical Society of the Pacific conference series; Vol. 388). Astronomical Society of the Pacific. http://aspbooks.org/custom/publications/paper/388-0143.html [details]
    • Bik, A., Lenorzer, A., Thi, W. F., Puga Antolín, E., Waters, L. B. F. M., Kaper, L., & Martín-Hernández, N. L. (2008). An infrared view of (candidate accretion) disks around massive young stars. In H. Beuther, H. Linz, & T. Henning (Eds.), Massive Star Formation: Observations Confront Theory: proceedings of a conference held at the Heidelberg Convention Center, Heidelberg, Germany, 10-14 September 2007 (pp. 78-85). (Astronomical Society of the Pacific conference series; Vol. 387). Astronomical Society of the Pacific. http://aspbooks.org/custom/publications/paper/387-0078.html [details]
    • Gies, D. R., Bolton, C. T., Blake, R. M., Caballero-Nieves, S. M., Crenshaw, D. M., Hadrava, P., ... McSwain, M. V. (2008). Stellar wind variations during the X-ray high and low states of Cygnus X-1. Astrophysical Journal, 678(2), 1237-1247. https://doi.org/10.1086/586690 [details]
    • Henrichs, H. F., Schnerr, R. S., de Jong, J. A., Kaper, L., Donati, J. F., & Catala, C. (2008). Search for the magnetic field of the O7.5 III star ξ Persei. Proceedings of the International Astronomical Union, 4(S259), 383-384. https://doi.org/10.1017/S1743921309030774 [details]
    • Kouwenhoven, M. B. N., Brown, A. G. A., Goodwin, S. P., Portegies Zwart, S. F., & Kaper, L. (2008). Pairing mechanisms for binary stars. Astronomische Nachrichten, 329(9-10), 984-987. https://doi.org/10.1002/asna.200811061 [details]
    • Navarro, R., Elswijk, E., Tromp, N., ter Horst, R., Horrobin, M., Vernet, J., ... Kaper, L. (2008). X-shooter near-IR spectrograph arm realisation. Proceedings of SPIE, the International Society for Optical Engineering, 7014, 70141Y. https://doi.org/10.1117/12.789778 [details]
    • Puga, E., Bik, A., Waters, L. B. F. M., Henning, T., Kaper, L., van den Ancker, M., Lenorzer, A., Churchwell, E., Kurtz, S., Rodón, J. A., Vasyunina, T., Kouwenhoven, M. B. N., Beuther, H., Linz, H., Horrobin, M., Stolte, A., de Koter, A., Thi, W. F., Martín-Hernández, N. L., ... Feldt, M. (2008). Probing the early evolution of young high-mass stars. In H. Beuther, H. Linz, & T. Henning (Eds.), Massive Star Formation: Observations Confront Theory: proceedings of a conference held at the Heidelberg Convention Center, Heidelberg, Germany, 10-14 September 2007 (pp. 331-337). (Astronomical Society of the Pacific conference series; Vol. 387). Astronomical Society of the Pacific. http://aspbooks.org/custom/publications/paper/387-0331.html [details]
    • Vernet, J., Kerber, F., Saitta, F., Mainieri, V., D'Odorico, S., Lidman, C., ... Royer, F. (2008). Building up a database of spectro-photometric standard stars from the UV to the near-IR: A status report. Proceedings of SPIE, the International Society for Optical Engineering, 7016, 70161G. https://doi.org/10.1117/12.788676 [details]
    • Williams, S. J., Gies, D. R., Henry, T. J., Orosz, J. A., McSwain, M. V., Hillwig, T. C., ... Kaper, L. (2008). Dynamical masses for the Large Magellanic Cloud massive binary system [L72] LH 54-425. Astrophysical Journal, 682(1), 492-498. https://doi.org/10.1086/589687 [details]

    2021

    • Ramírez-Tannus, M. C., Backs, F., de Koter, A., Sana, H., Beuther, H., Bik, A., Brandner, W., Kaper, L., Linz, H., Henning, T., & Poorta, J. (2021). A relation between the radial velocity dispersion of young clusters and their age: Evidence for hardening as the formation scenario of massive close binaries. Astronomy & Astrophysics, 645, [L10]. https://doi.org/10.1051/0004-6361/202039673 [details]
    • Shepard, K., Gies, D., Lester, K., Wang, L., Guo, Z., Kaper, L., De Koter, A., & Sana, H. (2021). The Whirling Dervishes: Spectral Analysis of VFTS 102 and 285. Bulletin - American Astronomical Society, 53(1), [116.03]. https://baas.aas.org/pub/2021n1i116p03/release/1 [details]

    2018

    • Jagourel, P., Fitzsimons, E., Hammer, F., De Frondat Laadim, F., Puech, M., Evans, C. J., ... Le Fèvre, O. (2018). MOSAIC: the ELT multi-object spectrograph. Proceedings of the SPIE, 10702, [10702A4]. https://doi.org/10.1117/12.2314135 [details]
    • Janssen, A. W., Sokolova, E., Pragt, J., Kragt, J., Navarro, R., Tromp, N., ... Dalton, G. (2018). Trade-offs in the visible spectrograph of the ELT instrument MOSAIC. Proceedings of the SPIE, 10702, [107029F]. https://doi.org/10.1117/12.2313302 [details]
    • Morris, S., Hammer, F., Jagourel, P., Evans, C. J., Puech, M., Dalton, G. B., Rodrigues, M., Sanchez-Janssen, R., Fitzsimons, E., Barbuy, B., Cuby, J-G., Kaper, L., Roth, M., Rousset, G., Myers, R., Le Fèvre, O., Finogenov, A., Kotilainen, J., Castilho, B., ... Berkourn, N. (2018). The ELT-MOS (MOSAIC): towards the construction phase. Proceedings of the SPIE, 10702, [107021W]. https://doi.org/10.1117/12.2311430 [details]
    • Puech, M., Evans, C. J., Disseau, K., Japelj, J., Ramírez-Agudelo, O. H., Rahmani, H., ... MOSAIC Science Team (2018). Simulating surveys for ELT-MOSAIC: status of the MOSAIC science case after phase A. Proceedings of the SPIE, 10702, [107028R]. https://doi.org/10.1117/12.2311292 [details]

    2017

    • Covino, S., Wiersema, K., Fan, Y. Z., Toma, K., Higgins, A. B., Melandri, A., D'Avanzo, P., Mundell, C. G., Palazzi, E., Tanvir, N. R., Bernardini, M. G., Branchesi, M., Brocato, E., Campana, S., Alighieri, S. D. S., Götz, D., Fynbo, J. P. U., Gao, W., Gomboc, A., ... Wijers, R. A. M. J. (2017). Author Correction: The unpolarized macronova associated with the gravitational wave event GW 170817. Nature Astronomy, 1, 805. https://doi.org/10.1038/s41550-017-0319-6
    • Kaper, L., Fynbo, J. P. U., Pugliese, V., & van Rest, D. (2017). The VLT/X-shooter GRB afterglow legacy survey. Proceedings of the International Astronomical Union, 12(S329), 410. https://doi.org/10.1017/S1743921317003428 [details]
    • Ramírez-Tannus, M. C., Kaper, L., de Koter, A., Tramper, F., Sana, H., Ramírez-Agudelo, O. H., Bik, A., Ellerbroek, L. E., & Ochsendorf, B. B. (2017). Massive pre-main-sequence stars in M17. Proceedings of the International Astronomical Union, 12(S329), 439. https://doi.org/10.1017/S1743921317002897 [details]

    2016

    • Evans, C. J., Puech, M., Rodrigues, M., Barbuy, B., Cuby, J-G., Dalton, G., Fitzsimons, E., Hammer, F., Jagourel, P., Kaper, L., Morris, S. L., Morris, T. J., & MOSAIC Science Team (2016). Science requirements and trade-offs for the MOSAIC instrument for the European ELT. Proceedings of the SPIE, 9908, [99089J]. https://doi.org/10.1117/12.2231675 [details]
    • Hammer, F., Morris, S., Kaper, L., Barbuy, B., Cuby, J. G., Roth, M., Jagourel, P., Evans, C. J., Puech, M., Fitzsimons, E., Dalton, G., Rodrigues, M., & MOSAIC team (2016). The E-ELT multi-object spectrograph: latest news from MOSAIC. Proceedings of the SPIE, 9908, [990824]. https://doi.org/10.1117/12.2232427 [details]
    • Piranomonte, S., Vergani, S. D., Malesani, D., Fynbo, J. P. U., Wiersema, K., & Kaper, L. (2016). GRB110715A: VLT redshift. GRB Coordinates Network, Circular Service, 1216. https://gcn.gsfc.nasa.gov/gcn/gcn3/12164.gcn3 [details]

    2015

    • Martins, F., Bergemann, M., Bestenlehner, J. M., Crowther, P. A., Hamann, W. R., Najarro, F., Nieva, M. F., Przybilla, N., Freimanis, J., Hou, W., & Kaper, L. (2015). SpS5 - II. Stellar and wind parameters. Proceedings of the International Astronomical Union, 10(H16), 420-428. https://doi.org/10.1017/S1743921314011788 [details]
    • Vink, J. S., Heger, A., Krumholz, M. R., Puls, J., Banerjee, S., Castro, N., Chen, K. J., Chenè, A. N., Crowther, P. A., Daminelli, A., Gräfener, G., Groh, J. H., Hamann, W. R., Heap, S., Herrero, A., Kaper, L., Najarro, F., Oskinova, L. M., Roman-Lopes, A., ... Zhang, Y. (2015). Very Massive Stars in the local Universe. Proceedings of the International Astronomical Union, 10(H16), 51-79. https://doi.org/10.1017/S1743921314004657 [details]

    2014

    • Cox, N. L. J., Cami, J., Kaper, L., Foing, B. H., Ehrenfreund, P., Ochsendorf, B. B., van Hooff, S. H. M., & Salama, F. (2014). X-Shooter Survey of Near-Infrared DIBs. Proceedings of the International Astronomical Union, 9(S297), 103-105. https://doi.org/10.1017/S1743921313015664 [details]
    • Hartoog, O. E., Malesani, D., Sanchez-Ramirez, R., de Ugarte Postigo, A., Levan, A. J., Fynbo, J. P. U., ... Kaper, L. (2014). GRB 140622A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 16437(1). [details]
    • Kaper, L. (2014). The Promise of Recent and Future Observatories and Instruments. Proceedings of the International Astronomical Union, 9(S297), 389-398. https://doi.org/10.1017/S1743921313016190 [details]
    • Wehres, N., Ochsendorf, B., Bally, J., Snow, T., Bierbaum, V., Cox, N. L. J., Kaper, L., & Tielens, A. G. G. M. (2014). Search for DIBs in Emission: MWC 922 - The Red Square Nebula. Proceedings of the International Astronomical Union, 9(S297), 226-228. https://doi.org/10.1017/S1743921313015913 [details]

    2013

    • Flores, H., Covino, S., Xu, D., Kruehler, T., Fynbo, J., Milvang-Jensen, B., ... Wiersema, K. (2013). GRB 130427A: VLT/X-shooter redshift confirmation. GRB Coordinates Network, Circular Service, 14491(1). [details]
    • Hartoog, O. E., Xu, D., Malesani, D., Tanvir, N. R., Fynbo, J. P. U., Kaper, L., & D'Elia, V. (2013). GRB 131117A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 15494. [details]
    • Klaassen, P. D., Mottram, J. C., Longmore, S. N., Fuller, G. A., van der Tak, F. F. S., & Kaper, L. (2013). High-mass star formation. Astronomy & Geophysics, 54(3), 3.33. https://doi.org/10.1093/astrogeo/att083 [details]
    • Xu, D., Malesani, D., Kruehler, T., Fynbo, J. P. U., Perley, D. A., Goldoni, P., ... Tanvir, N. R. (2013). GRB 111123A: Keck-I host detection and VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 14273(1). [details]
    • Xu, D., Malesani, D., Schulze, S., Fynbo, J. P. U., D'Elia, V., Goldoni, P., ... Wiersema, K. (2013). GRB 130606A: VLT/X-shooter redshift confirmation. GRB Coordinates Network, Circular Service, 14816(1). [details]
    • Xu, D., de Ugarte Postigo, A., Malesani, D., Vreeswijk, P., D'Elia, V., Fynbo, J. P. U., ... Vergani, S. D. (2013). GRB 130701A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 14956(1). [details]

    2012

    • D'Avanzo, P., Milvang-Jensen, B., Vreeswijk, P., Tanvir, N., Malesani, D., Goldoni, P., ... Fynbo, J. (2012). GRB 120311A: VLT/X-shooter observations. GRB Coordinates Network, Circular Service, 13051, 1. [details]
    • Ellerbroek, L. E., Kaper, L., Bik, A., Maaskant, K. M., & Podio, L. (2012). The Star Formation History of RCW 36. In A. C. Carciofi, & T. Rivinius (Eds.), Circumstellar Dynamics at High Resolution: proceedings of a joint ESO/Brazilian workshop held at Foz do Iguaçu, Brazil, 27 February-2 March 2012 (pp. 351-360). (Astronomical Society of the Pacific conference series; Vol. 464). Astronomical Society of the Pacific. http://www.aspbooks.org/a/volumes/article_details/?paper_id=34918 [details]
    • Kruehler, T., Tanvir, N. R., de Ugarte Postigo, A., Malesani, D., Fynbo, J., Melandri, A., ... Kaper, L. (2012). GRB 121027A: x-shooter redshift confirmation. GRB Coordinates Network, Circular Service, 13930, 1. [details]
    • Sana, H., de Koter, A., Garcia, M., Hartoog, O., Kaper, L., Tramper, F., ... Castro, N. (2012). X-shooter Spectroscopy of Massive Stars in the Local Group and Beyond. The Messenger, 148, 33-37. [details]
    • Sanchez-Ramirez, R., de Ugarte Postigo, A., Kruehler, T., Milvang-Jensen, B., Fynbo, J. P. U., Tanvir, N., ... Flores, H. (2012). GRB 121201A: x-shooter redshift. GRB Coordinates Network, Circular Service, 14035, 1. [details]

    2011

    • Cirasuolo, M., Afonso, J., Bender, R., Bonifacio, P., Evans, C., Kaper, L., ... Vanzi, L. (2011). MOONS: The Multi-Object Optical and Near-infrared Spectrograph. The Messenger, 145, 11-13. [details]
    • Ubachs, W., Bagdonaite, J., Murphy, M. T., Buning, R., & Kaper, L. (2011). Search for Cosmological µ-Variation from High-Redshift H2 Absorption: A Status Report. In C. Martins, & P. Molaro (Eds.), From Varying Couplings to Fundamental Physics: Proceedings of Symposium 1 of JENAM 2010 (pp. 125-137). (Astrophysics and Space Science Proceedings). Springer. https://doi.org/10.1007/978-3-642-19397-2_13 [details]
    • Vergani, S. D., Piranomonte, S., Hartoog, O. E., D'Elia, V., Cupani, G., de Ugarte Postigo, A., Kruehler, T., Fynbo, J. P. U., Milvang-Jensen, B., Malesani, D., Vreeswijk, P., Tanvir, N. R., & Kaper, L. (2011). GRB 111211A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 12667. https://gcn.gsfc.nasa.gov/gcn/gcn3/12677.gcn [details]

    2010

    • Chemla, F., Dalton, G., Guinouard, I., Pragt, J., Sawyer, E., Spanò, P., ... Kaper, L. (2010). OPTIMOS-EVE design trade-off analysis. Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, 7735, 184. https://doi.org/10.1117/12.857519
    • Groot, P., Kaper, L., Ellerbroek, L., Malesani, D., Jakobsson, P., Fynbo, J. P. U., ... Mason, E. (2010). GRB 100219A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 10441. [details]
    • Iping, R., Kaper, L., & Sonneborn, G. (2010). Wavelength-Dependent Structure in the Vela X-1 Bow Shock. Bulletin - American Astronomical Society, 215, 365.
    • Milvang-Jensen, B., Goldoni, P., Tanvir, N. R., Wiersema, K., Malesani, D., de Ugarte Postigo, A., ... Kruehler, T. (2010). GRB 100621A: VLT/X-shooter redshift. GRB Coordinates Network, Circular Service, 10876. [details]
    • Navarro, R., Chemla, F., Bonifacio, P., Flores, H., Guinouard, I., Huet, J-M., ... Hammer, F. (2010). Project overview of OPTIMOS-EVE: the fibre-fed multi-object spectrograph for the E-ELT. Proceedings of SPIE, the International Society for Optical Engineering, 7735, 77352L. https://doi.org/10.1117/12.857638 [details]
    • Vernet, J., Dekker, H., D'Odorico, S., Mason, E., Di Marcantonio, P., Downing, M., ... Zerbi, F. (2010). Performances of X-shooter, the new wide-band intermediate resolution spectrograph at the VLT. Proceedings of SPIE, the International Society for Optical Engineering, 7735, 77351I. https://doi.org/10.1117/12.857124 [details]

    2009

    • de Ugarte Postigo, A., D'Odorico, S., Vernet, J., Modigliani, A., Ramsay, S., Covino, S., ... Groot, P. J. (2009). X-shooter observations of GRB 090313. GRB Coordinates Network, Circular Service, 9015. [details]

    2019

    • Japelj, J., Kann, D. A., de Ugarte Postigo, A., Izzo, L., Fynbo, J. P. U., Malesani, D. B., ... Kaper, L. (2019). GRB 190627A: VLT/FORS2 spectroscopic redshift. GRB Coordinates Network, Circular Service, 24916. [details]
    • Japelj, J., Rossi, A., Malesani, D. B., Heintz, K. E., Pugliese, G., & Kaper, L. (2019). GRB 190531B: VLT optical upper limit. GRB Coordinates Network, Circular Service, 4711. https://gcn.gsfc.nasa.gov/gcn/gcn3/24711.gcn3 [details]

    2018

    • Cami, J., Cox, N. L. J., Farhang, A., Smoker, J., Elyajouri, M., Lallement, R., ... Wade, G. (2018). The ESO Diffuse Interstellar Band Large Exploration Survey (EDIBLES). The Messenger, 171, 31-36. https://doi.org/10.18727/0722-6691/5066 [details]
    • D'Avanzo, P., Bolmer, J., D'Elia, V., Fynbo, J. P. U., Heintz, K. E., Izzo, L., ... Smette, A. (2018). GRB 180325A: VLT/X-shooter spectroscopic observations. GRB Coordinates Network, Circular Service, 2555. [details]

    Lidmaatschap

    Mediaoptreden

    Spreker

    • Kaper, L. (speaker) (30-3-2016). Quantitative spectroscopy of OB-type stars, SWEDIBLES, Leiden.

    Andere

    • Hessels, J. W. T. (chair), Rowlinson, B. A. (organiser), Kaper, L. (organiser) & de Koter, A. (organiser) (2016). Nederlandse Astronomen Conferentie 2016, Nunspeet. Scientific Organising Committee (organising a conference, workshop, ...).

    2022

    • Brands, S. A., De Koter, A., Bestenlehner, J. M., Crowther, P. A., Sundqvist, J. O., Puls, J., Caballero-Nieves, S. M., Abdul-Masih, M., Driessen, F. A., García, M., Geen, S., Gräfener, G., Hawcroft, C., Kaper, L., Keszthelyi, Z., Langer, N., Sana, H., Schneider, F. R. N., Shenar, T. & Vink, J. S. (2022). The R136 star cluster dissected with Hubble Space Telescope/STIS. III. The most massive stars and their clumped winds. Zenodo. https://doi.org/10.5281/zenodo.6353513
    • Brands, S. A., De Koter, A., Bestenlehner, J. M., Crowther, P. A., Puls, J., Caballero-Nieves, S. M., Abdul-Masih, M., Driessen, F. A., Geen, S., Hawcroft, C., Kaper, L., Keszthelyi, Z., Langer, N., Sana, H., Shenar, T., Vink, J. S., Sundqvist, J. O., García, M. & Gräfener, G. (2022). Most massive stars and their clumped winds. Centre de Donnees Strasbourg (CDS). https://doi.org/10.26093/cds/vizier.36630036

    2020

    • Kaper, L., Guo, D., Poorta, H., Bik, A., Henning, T., de Koter, A., Pasquali, A., Ramirez Tannus, M., Davies, B., Linz, H., Ramírez Agudelo, O. H., Gennaro, M., Brandner, W., De Ridder, J., Beuther, H., Sana, H. & Naylor, T. (1-1-2020). M8, G333.6-0.2 and NGC6357 young stars. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36330155
    • Ramirez Tannus, M., Walborn, N. R., Sewi?o, M., Van Gelder, G. M. L., Gr?fener, G., Barb?, R. H., Kaper, L., Bestenlehner, J. M., Sabbi, E., Ellerbroek, L., de Koter, A., de Mink, S., Japelj, J., Vink, J. S., Sana, H. & Bik, A. (1-1-2020). Massive young stellar objects in 30 Doradus. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36360054

    2019

    • Hartmann, D. H., Jakobsson, P., Ledoux, C., Izzo, L., Starling, R., Bolmer, J., Wiersema, K., Tanvir, N. R., de Ugarte Postigo, U. A., de Pasquale, P. M., Rossi, A., Vergani, S. D., Covino, S., Fynbo, J. P. U., Watson, D., Kaper, L., Salvaterra, R., Petitjean, P., Noterdaeme, P., … Selsing, J. (1-9-2019). Reduced X-shooter spectra of GRB 190114A. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36290131

    2018

    • Cox, N. L. J., de Koter, A., Kaper, L. & Ramirez Tannus, M. (1-12-2018). DIB properties in lines of sight to M17. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36200052
    • Moller, P., Jakobsson, P., Salvaterra, R., Ledoux, C., Sbarufatti, B., Campana, S., Christensen, L., Malesani, D., Kaper, L., Fynbo, J. P. U., Starling, R. L. C., Japelj, J., Arabsalmani, M., Perley, D., Tanvir, N. R., Kann, D. A., Covino, S., D'Elia, V., Postigo, A. ., … Hartmann, D. H. (20-6-2018). GROND, NOT &amp; VLT/X-shooter obs. of GRB180325A. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.18609021

    2017

    • Taubenberger, S., Cami, J., Smith, K. T., Cox, N. L. J., Cikota, A., Siebenmorgen, R., Voshchinnikov, N. V., Kaper, L., Patat, F., Bagnulo, S. & Smoker, J. V. (1-12-2017). Southern Hemisphere ISM FORS2 spectropolarimetry. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36080146
    • Cami, J., Kaper, L., Monreal-Ibero, A., Laverick, M., Salama, F., Spaans, M., Sarre, P. J., Smoker, J., Bhatt, N. H., Elyajouri, M., Foing, B. H., Roueff, E., Smith, K. T., Farhang, A., Cordiner, M. A., Cox, N. L. J., Javadi, A., Ehrenfreund, P., Evans, C. J., … Mulas, G. (1-10-2017). The ESO DIBs Large Exploration Survey. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36060076
    • de Koter, A., Kaper, L., Ramírez Agudelo, O. H., Ellerbroek, L., Tramper, F., Bik, A., Ramirez Tannus, M., Sana, H. & Ochsendorf, B. B. (1-8-2017). M17 massive pms stars X-shooter spectra. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36040078
    • Kaper, L., Snow, T. P., Ochsendorf, B. B., Bally, J., Tielens, A. G. G. M., Wehres, N. & Cox, N. L. J. (1-5-2017). MWC 922 XSHOOTER spectra. Strasbourg Astronomical Data Center. https://doi.org/10.26093/cds/vizier.36010069

    2013

    2010

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