The Faint End of the Luminosity Function in the Core of the Coma Cluster

Details The Faint End of the Luminosity Function in the Core of the Coma Cluster The Faint End of the Luminosity Function in the Core of the Coma Cluster

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.4211m&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #42.11; Bulletin of the American Astronomical Society, Vol. 34, p.1169

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present optical measurements of the faint end of the luminosity function in the core of the Coma cluster. Dwarf galaxies are detected down to a limiting magnitude of MV ~ -7.5 in images taken with the Hubble Space Telescope. We believe this represents the faintest determination of the Coma luminosity function to date. Evidence is found for a steep faint end slope with α < ~ -1.75. Such a value is expected in theories in which the epoch of reionization is such that it inhibits dwarf galaxy formation in low density regions, while not affecting high density regions which form dwarfs earlier (Tully et al, 2002).

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