Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256l..37b&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 256, May 15, 1982, p. L37-L40. Research supported by the Natural Sci
Astronomy and Astrophysics
Astronomy
44
Cosmic Gases, Galactic Clusters, Intergalactic Media, X Ray Astronomy, Bremsstrahlung, Cosmology, Galactic Evolution, Heao 2
Scientific paper
The detection of hot, interstellar gas around the G49 group of galaxies by means of an X ray signature detected by the Einstein Observatory is reported. The observations were made in December 1979 using the IPC on the Einstein spacecraft. The absorption cut-off of the gas was calculated to be 0.65 plus 0.3 or minus 0.2 keV, a figure which corresponds to the 0.7 keV of the galaxies in the group. A density at the center of the gas is derived at 0.004/cu cm with a total mass of hot gas of 5 billion solar masses and a cooling time of 5 billion yr. Further investigations of X ray emissions from small galactic groups is recommended to assay their contribution to the soft X ray background.
Biermann Peter
Kronberg Philipp P.
Madore Barry F.
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