Mass Segregation in Dark Matter Models

Abstract

view Abstract Citations (4) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Mass Segregation in Dark Matter Models Campos, A. ; Yepes, G. ; Klypin, A. ; Murante, G. ; Provenzale, A. ; Borgani, S. Abstract We use the moments of counts of neighbors as given by the generalized correlation integrals, to study the clustering properties of dark matter halos (DHs) in cold dark matter (CDM) and cold + hot dark matter (CHDM) models. We compare the results with those found in the CfA and SSRS galaxy catalogs. We show that if we apply the analysis in redshift space, both models reproduce equally well the observed clustering of galaxies. Mass segregation is also found in the models: more massive DHs are more clustered compared with less massive ones. For example, at 3h-1 Mpc in real space, the number of neighbors in excess of random increases ∼3 times when the mass of halos increases by ∼100. In redshift space, this mass segregation is reduced by a factor ∼2-3 due to the peculiar velocities. Observational catalogs give an indication of luminosity and size segregation, which is consistent with the predictions of the models. Because the mass segregation is smaller in redshift space, it is suggestive that the real luminosity or size segregation of galaxies could be significantly larger than what it is found in redshift catalogs. Publication: The Astrophysical Journal Pub Date: June 1995 DOI: 10.1086/175766 arXiv: arXiv:astro-ph/9502018 Bibcode: 1995ApJ...446...54C Keywords: COSMOLOGY: DARK MATTER; COSMOLOGY: LARGE-SCALE STRUCTURE OF UNIVERSE; COSMOLOGY: THEORY; GALAXIES: CLUSTERS: GENERAL; Astrophysics E-Print: 13 pages including 9 figures (220 KB) in uuencoded compressed Postscript format. To appear in The Astrophysical Journal, June 10. Latex file and figures available at ftp://astrohp.ft.uam.es/pub/preprints/masseg full text sources arXiv | ADS |