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Gravitational Lensing & Stellar Dynamics: Dark-Matter and Baryons in Early-type Galaxies to z=1
L. V. E. Koopmans
Gravitational lensing and stellar dynamics provide two complementary, nearly orthogonal, constraints on the mass distribution of early-type lens galaxies. This allows the luminous…
CLASS B2108+213: A new wide separation gravitational lens system
J. P. McKean, I. W. A. Browne, N. J. Jackson +15
We present observations of CLASS B2108+213, the widest separation gravitational lens system discovered by the Cosmic Lens All-Sky Survey. Radio imaging using the VLA at 8.46 GHz an…
SDSSJ140228.22+632133.3: A New Spectroscopically Selected Gravitational Lens
Adam S. Bolton, Scott Burles, Leon V. E. Koopmans +2
(abridged) We present Gemini integral-field unit (IFU) spectroscopy and Hubble Space Telescope (HST) F435W- and F814W-band images of a new four-image gravitational lens, SDSSJ14022…
Galaxy Groups Associated with Gravitational Lenses and H_0 from B1608+656
Chris Fassnacht, Lori Lubin, John McKean +6
Compact groups of galaxies recently have been discovered in association with several strong gravitational lens systems. These groups provide additional convergence to the lensing p…
Discovery of a Transient U-band Dropout in a Lyman-Break Survey: A Tidally-Disrupted Star at z = 3.3?
Daniel Stern, P. G. van Dokkum, Peter Nugent +8
We report the discovery of a transient source in the central regions of galaxy cluster Abell 267. The object, which we call "PALS1", was found in a survey aimed at identifying high…
Massive Dark-matter halos and Evolution of Early-type Galaxies to z=1
Tommaso Treu, Leon V. E. Koopmans
(Shortened) The combination of lensing and stellar dynamics breaks the mass-anisotropy degeneracy and provides stringent constraints on the mass distribution in early-type (E/S0) g…