Distribution of galaxies around clusters: temperature and velocity dispersion dependence

Details Distribution of galaxies around clusters: temperature and velocity dispersion dependence Distribution of galaxies around clusters: temperature and velocity dispersion dependence

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.277..896v&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 277, Issue 3, pp. 896-900.

Astronomy and Astrophysics

Astronomy

1

Galaxies: Clusters: General, Galaxies: Fundamental Parameters

Scientific paper

We perform a cross-correlation analysis of galaxy counts on Lick maps and rich clusters of galaxies with measured temperatures T and velocity dispersions sigma. We find that galaxy density excesses up to ~20 Mpc from cluster centres are increasing linear functions on sigma and T with a statistically significant detection (<~99.99 per cent confidence determined by the method of resampling). Adopting a power-law model for the cluster-galaxy cross-correlation function we find that the cross-correlation length r_0 obeys the simple relations: r_0=8.8 (sigma/970)^1/2.2 Mpc and r_0=8.8 (T/4.8)^1/2.2 Mpc, where sigma is in km s^-1 and T in keV.

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