Isothermality of the gas in the Coma cluster

Details Isothermality of the gas in the Coma cluster Isothermality of the gas in the Coma cluster

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..615h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 15, 1988, p. 615-626. Research supported by the University of To

Astronomy and Astrophysics

Astronomy

58

Adiabatic Conditions, Cosmic Gases, Galactic Clusters, Intergalactic Media, Isothermal Processes, X Ray Sources, Galactic Mass, Gravitational Fields, Mass Flow, Temperature Distribution, X Ray Astronomy

Scientific paper

The high-quality X-ray spectrum of the Coma cluster observed by the Japanese satelite Tenma in conjunction with imaging data from the Einstein Observatory was used to explore the temperature distribution of the cluster gas. It is found that pure polytropic models are inadequate to describe this temperature distribution. Instead, a hybrid model is proposed consisting of a central isothermal region surrounded by a polytropic distribution. It is shown that as much as 75 percent of the global emission may come from the isothermal component.

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