S. Phillipps et al 1998 ApJ 493 L59 doi:10.1086/311144
Dwarf Spheroidal Galaxies in the Virgo Cluster
FREES. Phillipps1, Q. A. Parker2, J. M. Schwartzenberg1 and J. B. Jones1
Show affiliationsWe present a study of the smallest and faintest galaxies found in a very deep photographic R-band survey of regions of the Virgo Cluster, totalling over 3 deg2, made with the UK Schmidt Telescope. The objects we detect have the same physical sizes and surface brightnesses as Local Group dwarf spheroidal galaxies. The luminosity function of these extremely low luminosity galaxies (down to MR
-11 or about 5×10−5L
) is very steep, with a power-law slope α-2, as would be expected in many theories of galaxy formation via hierarchical clustering, supporting previous observational evidence at somewhat higher luminosities in other clusters.
- Subject headings
galaxies: clusters: individual (Virgo); galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: luminosity function, mass function; galaxies: photometry
- Dates
-
Issue 2 (1998 February 1)
Received 1997 October 28, accepted for publication 1997 November 25
Published 1998 January 14
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Dwarf Spheroidal Galaxies in the Virgo Cluster
S. Phillipps et al 1998 ApJ 493 L59
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