The cluster galaxy luminosity function at z= 0.3: a recent origin for the faint-end upturn? |
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| Authors: | D Harsono R De Propris |
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| Institution: | Department of Physics and Astronomy, University of California, Los Angeles, USA;Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile |
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| Abstract: | We derive deep luminosity functions (LFs) (to M z =?15 ) for galaxies in Abell 1835 ( z = 0.25) and AC 114 ( z = 0.31) , and compare these with the local z ' LF for 69 clusters. The data show that the faint-end upturn, the excess of galaxies above a single Schechter function at M z < ?17 , does not exist in the higher redshift clusters. This suggests that the faint-end upturn galaxies have been created recently, by infall into clusters of star-forming field populations or via tidal disruption of brighter objects. |
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| Keywords: | galaxies: dwarf galaxies: luminosity function mass function |
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