Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..120l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Jan. 1, 1990, p. 120-134. Research supported by th
Astronomy and Astrophysics
Astrophysics
77
Cooling Flows (Astrophysics), Galactic Clusters, Gas Dynamics, Molecular Clouds, Turbulence Effects, Astronomical Spectroscopy, Emission Spectra, High Temperature Gases, Interstellar Magnetic Fields, Recombination Reactions, X Ray Spectra
Scientific paper
Small amounts of warm, ionized gas are observed in the centers of many clusters of galaxies with cooling flows. The properties of these clouds of gas and, in particular, their ability to survive in the harsh environment of the intracluster medium are investigated. The widths of the optical emission lines from these clouds indicate relative motions of up to 1000 km/s, which easily leads to the destruction of clouds unless their properties are in a fairly narrow range. It is suggested that the hot gas in the flow is turbulent and that this is responsible for much of the observed velocity spread. Wave motions and noise associated with the turbulence can also provide a source of heating of the warm parts of the clouds through plasma slip.
Fabian Andrea C.
Loewenstein Michael
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