The SDSS Coadd: Cross-Correlation Weak Lensing and Tomography of Galaxy Clusters

Дата и время публикации : 2011-11-28T21:37:16Z

Авторы публикации и институты :
Melanie Simet
Jeffrey M. Kubo
Scott Dodelson
James T. Annis
Jiangang Hao
David Johnston
Huan Lin
Ribamar R. R. Reis
Marcelle Soares-Santos
Hee-Jong Seo

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 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
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: The shapes of distant galaxies are sheared by intervening galaxy clusters. We examine this effect in Stripe 82, a 275 square degree region observed multiple times in the Sloan Digital Sky Survey and coadded to achieve greater depth. We obtain a mass-richness calibration that is similar to other SDSS analyses, demonstrating that the coaddition 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 marginalizing 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.

Category: Physics