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The 2dF QSO Redshift Survey - XV. Correlation analysis of redshift-Space distortions | | J. da Angela
; P. J. Outram
; T. Shanks
; B.J. Boyle
; S. M. Croom
; N.S. Loaring
; L. Miller
; R.J. Smith .
; | | Date: |
20 Apr 2005 | | Subject: | astro-ph | | Affiliation: | 1,2), P. J. Outram , T. Shanks , B.J. Boyle (3,4), S. M. Croom , N.S. Loaring , L. Miller , R.J. Smith . ( University of Durham, Universidade do Porto, Australia Telescope National Facility, Anglo-Australian Observatory, Mullard Space Science Labora | | Abstract: | We analyse the redshift-space (z-space) distortions of QSO clustering in the 2dF QSO Redshift Survey (2QZ). To interpret the z-space correlation function, xi(sigma,pi), we require an accurate model for the QSO real-space correlation function, xi(r). Although a single power-law xi(r) model fits the projected correlation function (wp(sigma)) at small scales, it implies somewhat too shallow a slope for both wp(sigma) and the z-space correlation function, xi(s), at larger scales > 20 h^(-1) Mpc. Motivated by the form for xi(r) seen in the 2dF Galaxy Redshift Survey (2dFGRS) and in standard LCDM predictions, we use a double power-law model for xi(r) which gives a good fit to xi(s) and wp(sigma). The model is parametrized by a slope of gamma=1.45 for 1 | | Source: | arXiv, astro-ph/0504438 | | Services: | Forum | Review | PDF | Favorites | |
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