Dynamically hot galaxies. II - Global stellar populations

Details Dynamically hot galaxies. II - Global stellar populations Dynamically hot galaxies. II - Global stellar populations

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...411..153b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 411, no. 1, p. 153-169.

Astronomy and Astrophysics

Astrophysics

268

Astronomical Photometry, Galactic Bulge, Galactic Mass, Galactic Structure, Stellar Motions, Dwarf Galaxies, Elliptical Galaxies, Luminosity

Scientific paper

The global relationship between the stellar populations and the structural properties of dynamically hot galaxies (DHGs) is investigated using the same sample as was analyzed by Bender et al. (1992), which includes giant ellipticals, low-luminosity ellipticals, compact ellipticals, diffuse dwarf ellipticals, dwarf spheroidals, and bulges. It was found that all DHGs follow a single relationship between global stellar population (represented by Mg2 index or B-V color) and central velocity dispersion sigma(0), and that the Mg2-sigma(0) relation is significantly tighter than the relation between the Mg2 index and absolute luminosity. The relation between central Mg2 index and bulk B-V color was also found to be tight.

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