2011/11/30 by Melanie Simet, Jeffrey M. Kubo, Scott Dodelson +10
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Cluster (spacecraft) #Computer science #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Optics #Physics #Redshift #Redshift survey #Sky #Tomography #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1088/0004-637x/748/2/128
8 pages, 13 figures, submitted to ApJ. Analysis updated using revised photo-z catalog of Reis et al. arXiv:1111.6620v2. Changes in results are within the errors and the conclusions are unaffected
arxiv created 2011/12/19 · openalex publication_date 2012/03/15 · arxiv updated 2012/07/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The shapes of distant galaxies are sheared by intervening galaxy clusters. We examine this effect in Stripe 82, a 275 deg 2 region observed multiple times in the Sloan Digital Sky Survey (SDSS) and co-added to achieve greater depth. We obtain a mass-richness calibration that is similar to other SDSS analyses, demonstrating that the co-addition process did not adversely affect the lensing signal. We also propose a new parameterization of the effect of tomography on the cluster lensing signal which does not require binning in redshift, and we show that using this parameterization we can detect tomography for stacked clusters at varying redshifts. Finally, due to the sensitivity of the tomographic detection to accurately marginalize over the effect of the cluster mass, we show that tomography at low redshift (where dependence on exact cosmological models is weak) can be used to constrain mass profiles in clusters.