The Faint End of the Luminosity Function in Abell 426 and 539

Abstract

We derive $I$ band luminosity functions for galaxies in Abell 426 (Perseus and Abell 539, two rich, low galactic latitude clusters at moderate redshift. Cluster members are selected via the color-magnitude relation for bright galaxies. We find $\alpha =-1.56\pm 0.07$ for Perseus over the range $-19.4<M_I<-13.4$ ($15<I<21$) and $\alpha =-1.42\pm 0.14$ for $-18.5<M_I<-14$ ($17<I<21.5$) for A539. These LF's are similar to those derived in Virgo and Fornax, weakly supporting claims for the existence of a universal luminosity function for galaxies in clusters.

17 pages, 10 figures, 2 available from author 1 on request

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