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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…
LSST Science Book, Version 2.0
LSST Science Collaboration, Paul A. Abell, Julius Allison +245
A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade.…
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…
Evidence for the accelerated expansion of the Universe from weak lensing tomography with COSMOS
Tim Schrabback, Jan Hartlap, Benjamin Joachimi +19
We present a tomographic cosmological weak lensing analysis of the HST COSMOS Survey. Applying our lensing-optimized data reduction, principal component interpolation for the ACS P…
No Evidence of Quasar-Mode Feedback in a Four-Way Group Merger at z~0.84
Dale D. Kocevski, Lori M. Lubin, Brian C. Lemaux +3
We report on the results of a Chandra search for evidence of triggered nuclear activity within the Cl0023+0423 four-way group merger at z ~ 0.84. The system consists of four intera…
Dissecting the Gravitational Lens B1608+656. II. Precision Measurements of the Hubble Constant, Spatial Curvature, and the Dark Energy Equation of State
S. H. Suyu, P. J. Marshall, M. W. Auger +5
Strong gravitational lens systems with measured time delays between the multiple images provide a method for measuring the "time-delay distance" to the lens, and thus the Hubble co…