Group items tagged

This paper uses a large Hubble Space Telescope survey to obtain galaxy-galaxy lensing measurements at higher redshifts than previously possible, and explores the evolution of dark halo properties. (A)

This paper discusses the impact on cosmological-parameter measurement from cosmic-shear surveys owing to a variety of systematic errors. Of particular importance are the intrinsic alignments of galaxy shapes (prior to their being lensed) and the accuracy with which the lensed-galaxies redshifts can be estimated from their colors alone. (A)

This presents a galaxy-galaxy lensing study using a database large enough to subdivide the foreground galaxy sample by various properties, and still obtain a high signal-to-noise measurement of the mass profiles. (A)

A study of galaxy-galaxy lensing using a 45 square degree imaging survey, including the first significant attempt to measure the shape of the dark-matter halo by rotating (as well as translating) the background galaxy positions and shears to a common reference frame. (A)

This paper studies how the distribution of faint, background galaxies is affected by the presence of bright, foreground galaxies, and models this as a product of weak lensing magnification. (A)

This paper studies the change in number density of quasars with distance from bright galaxies and models the results as a gravitational lensing signal from the bright galaxies. It includes a discussion of the potential systematic errors in the measurements and why previous attempts at making this measurement were limited by the systematic errors. (A)