In Thuan T.X., Balkowski C., Cayatte V., Tran Thanh Van J., eds, "Dwarf Galaxies and Cosmology", Editions Frontières, 1998, p. 11
astro-ph/9804013

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THE FAINT END OF THE LUMINOSITY FUNCTION IN CLUSTERS

N. Trentham 1


1 Institute of Astronomy, Cambridge, U. K.


Abstract. I review recent measurements of the faint end of the galaxy luminosity function in galaxy clusters. Evidence is presented that the luminosity function of galaxies in the central parts of clusters is remarkably constant between clusters and that this luminosity function is steep at bright and faint magnitudes and shallow in-between. The curvature is highly significant - neither a power-law nor a Schechter function is consistent with the data. At no magnitude does alpha = - 1 fit the data well. The faintest galaxies in all clusters that have been studied are dwarf spheroidal galaxies.


Table of Contents

INTRODUCTION - LUMINOSITY FUNCTIONS

INTRODUCTION - DWARF GALAXIES

INTRODUCTION - CLUSTERS

TECHNIQUES

THE LUMINOSITY FUNCTIONS OF THE CORES OF RICH CLUSTERS

COMPARISON BETWEEN CLUSTERS AND THE FIELD

THE TYPES OF THE FAINTEST GALAXIES IN RICH CLUSTERS

THE LOWEST SURFACE-BRIGHTNESS GALAXIES

THE MASS FUNCTION

REFERENCES

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