Dwarf Galaxies in Clusters

Details Dwarf Galaxies in Clusters Dwarf Galaxies in Clusters

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phdt........11t&link_type=abstract

Thesis (PHD). UNIVERSITY OF HAWAII , Source DAI-B 58/05, p. 2471, Nov 1997, 249 pages.

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Coma Cluster, Luminosity Function

Scientific paper

This work presents a detailed study of dwarf galaxies in clusters. All clusters exhibit a similar luminosity function; this is steep at bright magnitudes and gradually rising at fainter magnitudes. Where α is the logarithmic slope of the luminosity function: φ(L)∝ Lα, this rise is always steeper than α = -1.3 fainter than MR = -18, but is always much shallower than α = -2. The universal cluster luminosity function is not consistent with the field luminosity function at bright magnitudes; at faint magnitudes they may be consistent but the statistics are at present poor. In every cluster we observed, the colors and the scale-lengths of the faintest galaxies suggest that they are dwarf spheroidal galaxies. In the two clusters where we have the best spatial resolution, the dwarfs seem to be more concentrated to the cluster center than are the giant galaxies.

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