Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..655t&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Oct. 1, 1986, p. 655-672.
Astronomy and Astrophysics
Astrophysics
92
Cooling Flows (Astrophysics), Density Distribution, Elliptical Galaxies, Galactic Evolution, High Temperature Gases, Interstellar Gas, Radiant Cooling, Emission Spectra, Line Spectra, Star Formation, Visible Spectrum
Scientific paper
The density profiles of the hot interstellar gas in 18 galaxies, mostly ellipticals, have been determined using X-ray data from the Einstein Observatory. Radiative cooling is important throughout most of this gas leading to mass-deposition rates of between 0.02 and 3 solar mass/yr. There are problems in determining the nature of the resultant cooling flows since these mass-deposition rates are significantly less than the expected injection of gas from stellar mass loss, and supernova heating is not accounted for. Possible solutions involving a multiphase medium and cooling outflows are suggested. Cooling flows in early-type galaxies have immediate implications for their chemical evolution, optical line emission, star formation, the behavior of cold disks, the activity of the nucleus and the confinement of radio jets.
Arnaud A. A. K.
Fabian Andrea C.
Forman William
Jones Christine
Thomas Peter A.
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