Winds in elliptical galaxies

Details Winds in elliptical galaxies Winds in elliptical galaxies

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...275...69w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 275, Dec. 1, 1983, p. 69-83. Research supported by the University of Virgin

Astronomy and Astrophysics

Astrophysics

44

Astronomical Models, Elliptical Galaxies, Galactic Structure, Stellar Winds, Cosmic Gases, Scaling Laws, Star Distribution, Stellar Mass Ejection

Scientific paper

Using a variety of both de Vaucouleurs and modified King models, it is found that steady state winds can exist in all observed elliptical galaxies at the present epoch. A specific density scaling law for ellipticals is adopted so the models can conveniently span most of the range in mass exhibited by normal ellipticals. Scaling relations for winds within and beyond galaxies are developed. Many normal ellipticals seem to have small amounts (not greater than about 0.000001 solar mass) of cool ionized gas. Several mechanisms for generating this gas in spite of the presence of winds are investigated. Plausible heavy halo models are shown to have negligible effect upon the gas flow within practical scale lengths, even when the luminous material comprises only 10 percent of the total mass within the galaxy. However, incomplete thermalization of planetary nebulae may account for the ionized gas.

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