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The Faint-End of the Galaxy Luminosity Function in the Hydra I Cluster

Published online by Cambridge University Press:  01 August 2006

H. Yamanoi  and
M. Tanaka
H. Yamanoi
Affiliation:
Department of Astronomical Science, School of Physical Sciences, The Graduate University for Advanced Studies (Sokendai), National Astronomical Observatory of Japan email: [email protected]
M. Tanaka
Affiliation:
Department of Astronomy, School of Science, University of Tokyo
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Abstract

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We examine the galaxy luminosity functions (LFs) in the Hydra I cluster (Abell 1060) at z = 0.0126, for which very faint galaxies (down to M ~ −10) have not been surveyed yet. We conclude that the total LF has a slightly steep slope (α ~ −1.6) at −20 < M < −10 in the B- and RC-bands. The numbers of galaxies at the faint end (M ≳ −14) differ in between the cluster center and the outskirts slightly. We divide the Hydra member galaxies into red/blue galaxies and find that the shape of LFs in the faint magnitude range is determined by red dwarf galaxies.

Keywords

galaxiesclustersluminosity functionsdwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 257
Copyright
Copyright © International Astronomical Union 2007