L
Léon V. E. Koopmans
Researcher at Kapteyn Astronomical Institute
Publications - 68
Citations - 3170
Léon V. E. Koopmans is an academic researcher from Kapteyn Astronomical Institute. The author has contributed to research in topics: Galaxy & Gravitational lens. The author has an hindex of 26, co-authored 68 publications receiving 2809 citations. Previous affiliations of Léon V. E. Koopmans include University of Groningen & California Institute of Technology.
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Journal ArticleDOI
The Sloan Lens ACS Survey. II. Stellar Populations and Internal Structure of Early-Type Lens Galaxies*
Tommaso Treu,Tommaso Treu,Léon V. E. Koopmans,Adam S. Bolton,Adam S. Bolton,Scott Burles,Leonidas A. Moustakas +6 more
TL;DR: In this article, the authors used HST images to derive effective radii and effective surface brightnesses of 15 early-type (E+S0) lens galaxies identified by the SLACS Survey.
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The first and second data releases of the Kilo-Degree Survey
Jelte T. A. de Jong,Gijs Verdoes Kleijn,Danny Boxhoorn,Hugo Buddelmeijer,Massimo Capaccioli,Fedor Getman,Aniello Grado,Ewout Helmich,Zhuoyi Huang,N. Irisarri,Konrad Kuijken,Francesco La Barbera,John McFarland,Nicola R. Napolitano,Mario Radovich,Gert Sikkema,Edwin A. Valentijn,Kor G. Begeman,Massimo Brescia,Stefano Cavuoti,Ami Choi,O. Cordes,Giovanni Covone,Massimo Dall'Ora,Hendrik Hildebrandt,Giuseppe Longo,Reiko Nakajima,Maurizio Paolillo,E. Puddu,A. Rifatto,Crescenzo Tortora,Edo van Uitert,Axel Buddendiek,Joachim Harnois-Déraps,Thomas Erben,Martin Eriksen,Catherine Heymans,Henk Hoekstra,Benjamin Joachimi,Thomas D. Kitching,Dominik Klaes,Léon V. E. Koopmans,Fabian Köhlinger,Nivya Roy,Cristóbal Sifón,Peter Schneider,William J. Sutherland,Massimo Viola,Willem-Jan Vriend +48 more
TL;DR: The Kilo-Degree Survey (KiDS) as discussed by the authors is an optical wide-field imaging survey carried out with the VLT Survey Telescope and the OmegaCAM camera.
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Two-dimensional kinematics of SLACS lenses – III. Mass structure and dynamics of early-type lens galaxies beyond z ≃ 0.1
Matteo Barnabè,Matteo Barnabè,O. Czoske,O. Czoske,Léon V. E. Koopmans,Tommaso Treu,Adam S. Bolton +6 more
TL;DR: In this article, the authors combine the constraints from both gravitational lensing and stellar kinematics to perform a detailed investigation of the internal mass distribution, amount of dark matter, and dynamical structure of the 16 early-type lens galaxies from the Sloan Lens ACS Survey (SLACS Survey).
Journal ArticleDOI
The Sloan Lens ACS Survey. VII. Elliptical Galaxy Scaling Laws from Direct Observational Mass Measurements
Adam S. Bolton,Adam S. Bolton,Tommaso Treu,Léon V. E. Koopmans,Raphael Gavazzi,Raphael Gavazzi,Raphael Gavazzi,Leonidas A. Moustakas,Scott Burles,David J. Schlegel,Randall B. Wayth +10 more
TL;DR: In this paper, the authors used a sample of 53 massive early-type strong gravitational lens galaxies with well-measured redshifts (ranging from z = 0.06 to 0.36) and stellar velocity dispersions (between 175 and 400 km s−1) from the SLACS Survey to derive numerous empirical scaling relations.
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The sloan lens ACS survey. VI. Discovery and analysis of a double Einstein ring
Raphael Gavazzi,Tommaso Treu,Léon V. E. Koopmans,Adam S. Bolton,Adam S. Bolton,Leonidas A. Moustakas,Scott Burles,Philip J. Marshall +7 more
TL;DR: In this paper, the authors reported the discovery of two concentric partial Einstein rings around the gravitational lens SDSSJ0946+1006, as part of the Sloan Lens ACS Survey.