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19 April 2024 |
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Cosmic homogeneity demonstrated with luminous red galaxies | | David W. Hogg
; Daniel J. Eisenstein
; Michael R. Blanton
; Neta A. Bahcall
; J. Brinkmann
; James E. Gunn
; Donald P. Schneider
; | | Date: |
8 Nov 2004 | | Journal: | Astrophys.J. 624 (2005) 54-58 | | Subject: | astro-ph | | Affiliation: | NYU), Daniel J. Eisenstein (Arizona | | Abstract: | We test the homogeneity of the Universe at $zsim 0.3$ with the Luminous Red Galaxy (LRG) spectroscopic sample of the Sloan Digital Sky Survey. First, the mean number $N(R)$ of LRGs within completely surveyed LRG-centered spheres of comoving radius $R$ is shown to be proportional to $R^3$ at radii greater than $Rsim 70 h^{-1} mathrm{Mpc}$. The test has the virtue that it does not rely on the assumption that the LRG sample has a finite mean density; its results show, however, that there emph{is} such a mean density. Secondly, the survey sky area is divided into 10 disjoint solid angular regions and the fractional rms density variations of the LRG sample in the redshift range $0.2 | | Source: | arXiv, astro-ph/0411197 | | Services: | Forum | Review | PDF | Favorites | |
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