Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-10-02
Astronomy and Astrophysics
Astrophysics
4 pages; to appear in "Gas and Galaxy Evolution" ASP Conf. Ser. eds. Hibbard, Rupen & van Gorkom
Scientific paper
We review the origin and structure of hot (cooling flow) gas in elliptical galaxies. X-ray observations can be used to determine the stellar mass to light ratio, the mass profiles of dark matter halos, and the interstellar magnetic field. Interstellar gas cools over a large volume, forming stars with a bottom-heavy IMF. For consistency with the thin fundamental plane, young stars must be optically luminous. Circular X-ray isophotes in rotating elliptical galaxies indicate distributed radiative cooling or strong interstellar turbulence.
Brighenti Fabrizio
Mathews William G.
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