Infall of Gas from Intergalactic Space and Soft X-Ray Background

Details Infall of Gas from Intergalactic Space and Soft X-Ray Background Infall of Gas from Intergalactic Space and Soft X-Ray Background

Oct 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972ap%26ss..18..504t&link_type=abstract

Astrophysics and Space Science, Volume 18, Issue 2, pp.504-513

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

As the origin of the soft X-ray background, emission of soft X-rays from shocks occurred in the accretion of intergalactic gas onto the Galaxy is studied. Infall of discrete gas clouds cannot explain the diffuse component of soft X-rays. If intergalactic gas rich in heavy elements as the cosmic abundance continously flows into the Galaxy and forms a standing shock surrounding the Galaxy, the line emissions by heavy elements from the shocked gas explain the soft X-ray background. Formation of the high velocity cloud by thermal instability in the shocked gas is also discussed briefly.

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