Medium-resolution spectroscopy of nucleated dwarf elliptical galaxies

Details Medium-resolution spectroscopy of nucleated dwarf elliptical galaxies Medium-resolution spectroscopy of nucleated dwarf elliptical galaxies

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..123b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 1, 1988, p. 123-133.

Astronomy and Astrophysics

Astrophysics

43

Astronomical Spectroscopy, Dwarf Galaxies, Elliptical Galaxies, Galactic Nuclei, Main Sequence Stars, Spectral Resolution, Balmer Series, Spectral Line Width, Star Distribution, Virgo Galactic Cluster

Scientific paper

The results of medium-resolution spectroscopy of a small sample of nucleated dwarf elliptical (dE) galaxies in the Virgo Cluster are presented. The velocity dispersion of the dEs is as large as it is for the dwarf irregulars and blue compact dwarfs. The velocity distribution is not similar to that which holds for the luminous Es and SOs in Virgo. A significant percentage of dEs are at quite low velocity. The Balmer line strength in the dE nuclei never exceeds 2.5 A. Overall, the spectra most closely resemble the spectra of metal-rich Galactic globular clusters with possibly an extended main sequence due to a younger mean age.

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