The prevalence of cooling flows in early-type galaxies
journal contributionposted on 2023-06-08, 12:42 authored by Peter ThomasPeter Thomas, A C Fabian, K A Arnaud, W Forman, C Jones
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.
JournalMonthly Notices of the Royal Astronomical Society
PublisherRoyal Astronomical Society
Department affiliated with
- Physics and Astronomy Publications
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