The cluster galaxy luminosity function at $z=0.3$: a recent origin for the faint-end upturn ?

Details The cluster galaxy luminosity function at $z=0.3$: a recent origin for the faint-end upturn ? The cluster galaxy luminosity function at $z=0.3$: a recent origin for the faint-end upturn ?

2007-06-20

arxiv.org/abs/0706.2994v1

Astronomy and Astrophysics

Astrophysics

6 pages, MNRAS main journal, accepted for publication

Scientific paper

10.1111/j.1365-2966.2007.12136.x

We derive deep luminosity functions (to $M_z=-15$) for galaxies in Abell 1835 ($z=0.25$) and AC 114 ($z=0.31$) and compare these with the local $z'$ luminosity function 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.^M

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