The Distribution of Satellite Galaxies

Details The Distribution of Satellite Galaxies The Distribution of Satellite Galaxies

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269..696l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 3/AUG1, P. 696, 1994

Astronomy and Astrophysics

Astronomy

27

Scientific paper

We carry out a statistical analysis of the distribution of faint satellites around galaxies of differing Hubble type. Following Holmberg, we count the number of faint images on Schmidt survey plates around primaries of known redshift. Our procedure leads to a highly significant detection of the satellites. On average, the projected distance of these systems from their primaries is distributed as {SIGMA}(r_p_) is proportional to r_p_^-γ^ with γ ~ 0.9. The satellite populations around primaries of different Hubble type are significantly different: satellites are more concentrated around early-type primaries, with a higher absolute abundance within ~0.25h^-1^ Mpc^-1^. If we assume a standard `field' luminosity function, we find that galaxies with - 18 < B <-17^2^ are about three times more weakly clustered to their primaries than are bright galaxies at separations of order 1 Mpc. At fainter magnitudes, the clustering appears stronger, suggesting the presence of a new population of dwarfs which exist only in close association with bright galaxies.

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