The prevalence of cooling flows in early-type galaxies

Thomas, P A, Fabian, A C, Arnaud, K A, Forman, W and Jones, C (1986) The prevalence of cooling flows in early-type galaxies. Monthly Notices of the Royal Astronomical Society, 222 (1). pp. 655-672. ISSN 1365-2966

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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.

Item Type: Article
Keywords: Observations, Cool core, Galaxies
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QB Astronomy
Depositing User: Peter Thomas
Date Deposited: 07 Nov 2012 10:07
Last Modified: 07 Mar 2017 08:22

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