Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..820s&link_type=abstract
Astrophysical Journal, Part 1, vol. 244, Mar. 15, 1981, p. 820-834.
Astronomy and Astrophysics
Astrophysics
50
Elliptical Galaxies, Galactic Evolution, Intergalactic Media, Interstellar Gas, Stellar Winds, Supernovae, Density Distribution, Galactic Radiation, Gusts, Hydrodynamic Equations, Hydrogen, Neutral Gases, X Rays
Scientific paper
The pulsed wind is an intrinsic mechanism for removing gas from elliptical galaxies and is based upon the suggestion that Type I supernovae originate in a young stellar population. In this model, a period of gas accumulation is followed by cooling and star formation which is followed by a burst of supernova activity and a short-lived but intense wind. The process repeats on a time scale of 500 to 1,000 million years. The model leads naturally to a bimodal distribution of elliptical galaxies in neutral hydrogen content, with ellipticals being either gas rich at the level of 10 to the 8th to 10 to the 9th solar masses of H I or gas poor with essentially no neutral hydrogen.
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