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• W2018677018 abstract "We present measurements of the velocity dispersion profile (VDP) for galaxy groups in the final data release of the Sloan Digital Sky Survey (SDSS). For groups of given mass, we estimate the redshift-space cross-correlation function (CCF) with respect to a reference galaxy sample, ξ(s)(rp, π), the projected CCF, wp(rp), and the real-space CCF, ξcg(r). The VDP is then extracted from the redshift distortion in ξ(s)(rp, π), by comparing ξ(s)(rp, π) with ξcg(r). We find that the velocity dispersion (VD) within virial radius (R200) shows a roughly flat profile, with a slight increase at radii below ∼0.3R200 for high-mass systems. The average VD within the virial radius, σv, is a strongly increasing function of central galaxy mass. We apply the same methodology to N-body simulations with the concordance Λ cold dark matter cosmology but different values of the density fluctuation parameter σ8, and we compare the results to the SDSS results. We show that the σv − M* relation from the data provides stringent constraints on both σ8 and σms, the dispersion in log M* of central galaxies at fixed halo mass. Our best-fitting model suggests σ8 = 0.86 ± 0.03 and σms = 0.16 ± 0.03. The slightly higher value of σ8 compared to the WMAP7 result might be due to a smaller matter density parameter assumed in our simulations. Our VD measurements also provide a direct measure of the dark matter halo mass for central galaxies of different luminosities and masses, in good agreement with the results obtained by Mandelbaum et al. from stacking the gravitational lensing signals of the SDSS galaxies." @default.
• W2018677018 created "2016-06-24" @default.
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• W2018677018 date "2012-09-25" @default.
• W2018677018 modified "2023-09-25" @default.
• W2018677018 title "INTERNAL KINEMATICS OF GROUPS OF GALAXIES IN THE SLOAN DIGITAL SKY SURVEY DATA RELEASE 7" @default.
• W2018677018 cites W1564424021 @default.
• W2018677018 cites W1574568311 @default.
• W2018677018 cites W1632875404 @default.
• W2018677018 cites W1781709405 @default.
• W2018677018 cites W1847269195 @default.
• W2018677018 cites W1920975007 @default.
• W2018677018 cites W1944901286 @default.
• W2018677018 cites W1964242656 @default.
• W2018677018 cites W1967936658 @default.
• W2018677018 cites W1970170972 @default.
• W2018677018 cites W1973368884 @default.
• W2018677018 cites W1977025542 @default.
• W2018677018 cites W1978012124 @default.
• W2018677018 cites W1980407824 @default.
• W2018677018 cites W1982576080 @default.
• W2018677018 cites W1982981992 @default.
• W2018677018 cites W1988235022 @default.
• W2018677018 cites W1989251681 @default.
• W2018677018 cites W1990879456 @default.
• W2018677018 cites W1992008388 @default.
• W2018677018 cites W1993535134 @default.
• W2018677018 cites W1999367759 @default.
• W2018677018 cites W1999812653 @default.
• W2018677018 cites W2004491479 @default.
• W2018677018 cites W2007559135 @default.
• W2018677018 cites W2011258461 @default.
• W2018677018 cites W2018719255 @default.
• W2018677018 cites W2028715663 @default.
• W2018677018 cites W2030097791 @default.
• W2018677018 cites W2031178755 @default.
• W2018677018 cites W2032095250 @default.
• W2018677018 cites W2032469582 @default.
• W2018677018 cites W2033613971 @default.
• W2018677018 cites W2035000458 @default.
• W2018677018 cites W2037280449 @default.
• W2018677018 cites W2038040928 @default.
• W2018677018 cites W2039455442 @default.
• W2018677018 cites W2039807009 @default.
• W2018677018 cites W2046551076 @default.
• W2018677018 cites W2048678471 @default.
• W2018677018 cites W2049524691 @default.
• W2018677018 cites W2049971403 @default.
• W2018677018 cites W2058780667 @default.
• W2018677018 cites W2059407430 @default.
• W2018677018 cites W2062511725 @default.
• W2018677018 cites W2063578468 @default.
• W2018677018 cites W2065959887 @default.
• W2018677018 cites W2067264089 @default.
• W2018677018 cites W2069685156 @default.
• W2018677018 cites W2073501758 @default.
• W2018677018 cites W2074604010 @default.
• W2018677018 cites W2075100033 @default.
• W2018677018 cites W2077054687 @default.
• W2018677018 cites W2078257430 @default.
• W2018677018 cites W2078554262 @default.
• W2018677018 cites W2080927107 @default.
• W2018677018 cites W2083950714 @default.
• W2018677018 cites W2084790702 @default.
• W2018677018 cites W2091353274 @default.
• W2018677018 cites W2092695191 @default.
• W2018677018 cites W2094993922 @default.
• W2018677018 cites W2098202751 @default.
• W2018677018 cites W2103612329 @default.
• W2018677018 cites W2103616411 @default.
• W2018677018 cites W2104470499 @default.
• W2018677018 cites W2107337450 @default.
• W2018677018 cites W2123164015 @default.
• W2018677018 cites W2124199755 @default.
• W2018677018 cites W2128759530 @default.
• W2018677018 cites W2135497536 @default.
• W2018677018 cites W2147357138 @default.
• W2018677018 cites W2147875900 @default.
• W2018677018 cites W2147981121 @default.
• W2018677018 cites W2149969207 @default.
• W2018677018 cites W2157544440 @default.
• W2018677018 cites W2157593344 @default.
• W2018677018 cites W2157917411 @default.
• W2018677018 cites W2170689655 @default.
• W2018677018 cites W2949078855 @default.
• W2018677018 cites W3098068403 @default.
• W2018677018 cites W3098632302 @default.
• W2018677018 cites W3098804119 @default.
• W2018677018 cites W3100024326 @default.
• W2018677018 cites W3100110286 @default.
• W2018677018 cites W3100382286 @default.

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