Other
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..804c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 88, June 1983, p. 804-812.
Other
134
Astronomical Spectroscopy, Dwarf Galaxies, Elliptical Galaxies, Galactic Structure, Star Distribution, Stellar Color, Absorption Spectra, Astronomical Photography, Balmer Series, Electrophotometry, Line Spectra, Stellar Evolution, Stellar Mass
Scientific paper
A small number of low-luminosity elliptical galaxies in the Virgo cluster and around other prominent galaxies have been studied using photoelectric and photographic techniques. The color-magnitude relation for ellipticals now extends from Mv = -23 to -15, and is linear over the range with a slope of 0.10 in U-V per visual magnitude. Galaxies which are known to contain a large number of young stars are from 0.10 to 0.20 mag bluer in U-V than the lower envelope of the dwarf elliptical color-magnitude relation. Surface brightness profiles of the dwarfs have revealed some interesting distinctions between themselves and the brighter E's. Their intensity profiles are shallower than those of the bright E's, meaning they are of lower mean density. These mean densities are also a function of the total luminosity. The flattening distribution of the dwarfs is like that of the bright ellipticals, and is also similar to the flattening distribution of field irregular galaxies.
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