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Adaptive Optics Observations of B0128+437: A Low-Mass, High-Redshift Gravitational Lens
David J. Lagattuta, Matthew W. Auger, Christopher D. Fassnacht
We use high-resolution adaptive optics (AO) imaging on the Keck II telescope to study the gravitational lens B0128+437 in unprecedented detail, allowing us to resolve individual le…
Cosmic Evolution of Black Holes and Spheroids. IV. The BH Mass - Spheroid Luminosity Relation
Vardha Nicola Bennert, Tommaso Treu, Jong-Hak Woo +5
From high-resolution images of 23 Seyfert-1 galaxies at z=0.36 and z=0.57 obtained with the Near Infrared Camera and Multi-Object Spectrometer on board the Hubble Space Telescope (…
The initial mass function of early-type galaxies
T. Treu, M. W. Auger, L. V. E. Koopmans +3
We determine an absolute calibration of the initial mass function (IMF) of early-type galaxies, by studying a sample of 56 gravitational lenses identified by the SLACS Survey. Unde…
The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies
M. W. Auger, T. Treu, A. S. Bolton +5
We present the current photometric dataset for the Sloan Lens ACS (SLACS) Survey, including HST photometry from ACS, WFPC2, and NICMOS. These data have enabled the confirmation of…
Cosmic Evolution of Virial and Stellar Mass in Massive Early-Type Galaxies
David J. Lagattuta, Christopher D. Fassnacht, Matthew W. Auger +7
We measure the average mass properties of a sample of 41 strong gravitational lenses at moderate redshift (z ~ 0.4 - 0.9), and present the lens redshift for 6 of these galaxies for…
Can dry merging explain the size evolution of early-type galaxies?
C. Nipoti, T. Treu, M. W. Auger +1
The characteristic size of early-type galaxies (ETGs) of given stellar mass is observed to increase significantly with cosmic time, from redshift z>2 to the present. A popular expl…