The source of the X-ray background

Details The source of the X-ray background The source of the X-ray background

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217....3h&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 1, 1977, p. 3-5.

Astronomy and Astrophysics

Astrophysics

1

Background Radiation, Big Bang Cosmology, Cosmic X Rays, Galactic Clusters, Galactic Evolution, X Ray Sources, Astronomical Models, Density (Number/Volume), Gas Temperature, Radiant Flux Density, Time Dependence

Scientific paper

Under the hypothesis that protoclusters of galaxies were the first objects to condense in the early universe, a sufficient mass of the universe was heated to temperatures of at least 10 million K to produce the observed soft X-ray background. A further observational test to distinguish between this hypothesis and the hypothesis that galaxies formed before protoclusters is suggested.

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