Origin of the X-ray background

Details Origin of the X-ray background Origin of the X-ray background

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...212..360h&link_type=abstract

Astrophysical Journal, Part 1, vol. 212, Mar. 1, 1977, p. 360-366.

Astronomy and Astrophysics

Astrophysics

9

Background Radiation, Gamma Rays, High Energy Electrons, Supernovae, X Rays, Compton Effect, Cosmology, Diffuse Radiation, Microwave Emission, X Ray Spectra

Scientific paper

Energetic electrons produced by an early generation of supernovae could have given rise to the diffuse X-ray and gamma-ray background by inverse Compton scattering on ambient photons emitted by the supernova population. If the supernovae were formed at epochs between 30 and 100 million years after the cosmic expansion and if the spectrum of the electrons they injected into the (then) interstellar medium resembled the present-day spectrum of primary Galactic cosmic-ray electrons, then the predicted X- and gamma-ray spectrum closely resembles the observed spectrum over an energy range of five decades. In particular, the present theory predicts the observed change in spectral index around 25 keV. The properties of the supernova population needed to secure quantitative agreement between the predictions of the present theory and observation are identical with those postulated earlier by Layzer and Hively (1973) to explain the microwave background.

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