Interstellar matter in early-type galaxies. II - The relationship between gaseous components and galaxy types

Details Interstellar matter in early-type galaxies. II - The relationship between gaseous components and galaxy types Interstellar matter in early-type galaxies. II - The relationship between gaseous components and galaxy types

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..484b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 10, 1992, p. 484-502.

Astronomy and Astrophysics

Astrophysics

129

Cosmic Dust, Galactic Radiation, Interstellar Extinction, Interstellar Gas, X Rays, Carbon Monoxide, Hydrogen, Line Spectra, Neutral Atoms, Radio Emission, Star Formation

Scientific paper

Interstellar components of early-type galaxies are established by galactic type and luminosity in order to search for relationships between the different interstellar components and to test the predictions of theoretical models. Some of the data include observations of neutral hydrogen, carbon monoxide, and radio continuum emission. An alternative distance model which yields LX varies as LB2.45, a relation which is in conflict with simple cooling flow models, is discussed. The dispersion of the X-ray luminosity about this regression line is unlikely to result from stripping. The striking lack of clear correlations between hot and cold interstellar components, taken together with their morphologies, suggests that the cold gas is a disk phenomenon while the hot gas is a bulge phenomenon, with little interaction between the two. The progression of galaxy type from E to Sa is not only a sequence of decreasing stellar bulge-to-disk ratio, but also of hot-to-cold-gas ratio.

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