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25 April 2024 |
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Article overview
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Cross-correlation Weak Lensing of SDSS Galaxy Clusters I: Measurement | | Erin S. Sheldon
; David E. Johnston
; Ryan Scranton
; Ben P. Koester
; Timothy A. McKay
; Hiroaki Oyaizu
; Carlos Cunha
; Marcos Lima
; Huan Lin
; Joshua A. Frieman
; Risa H. Wechsler
; James Annis
; Rachel Mandelbaum
; Neta A. Bahcall
; Masataka Fukugita
; | | Date: |
7 Sep 2007 | | Abstract: | This is the first in a series of papers on the weak lensing effect caused by
clusters of galaxies in Sloan Digital Sky Survey. The photometrically selected
cluster sample, known as MaxBCG, includes ~130,000 objects between redshift 0.1
and 0.3, ranging in size from small groups to massive clusters. We split the
clusters into bins of richness and luminosity and stack the surface density
contrast to produce mean radial profiles. The mean profiles are detected over a
range of scales, from the inner halo (25 kpc/h) well into the surrounding large
scale structure (30 Mpc/h), with a significance of 15 to 20 in each bin. The
signal over this large range of scales is best interpreted in terms of the
cluster-mass cross-correlation function. We pay careful attention to sources of
systematic error, correcting for them where possible and bounding them where
not. We find that the profiles scale strongly with richness and luminosity. We
find the signal within a given richness bin depends upon luminosity, suggesting
that luminosity is more closely correlated with mass than galaxy counts. We
split the samples by redshift but detect no significant evolution. The profiles
are not well described by power laws. In a subsequent series of papers we
invert the profiles to three-dimensional mass profiles, show that they are well
fit by a halo model description, measure mass-to-light ratios and provide a
cosmological interpretation. | | Source: | arXiv, 0709.1153 | | Services: | Forum | Review | PDF | Favorites | |
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