The cosmic gamma-ray background from Type IA supernovae

Details The cosmic gamma-ray background from Type IA supernovae The cosmic gamma-ray background from Type IA supernovae

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403...32t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 1, p. 32-36.

Astronomy and Astrophysics

Astrophysics

34

Cosmic Rays, Gamma Ray Astronomy, Nuclear Astrophysics, Supernovae, Astronomical Spectroscopy, Background Radiation, Gamma Ray Spectra, Universe

Scientific paper

We present an improved calculation of the cumulative gamma-ray spectrum of Type Ia supernovae during the history of the universe. We follow Clayton & Ward (1975) in using a few Friedmann models and two simple histories of the average galaxian nucleosynthesis rate, but we improve their calculation by modeling the gamma-ray scattering in detailed numerical models of SN Ia's. The results confirm that near 1 MeV the SN Ia background may dominate, and that it is potentially observable, with high scientific importance. A very accurate measurement of the cosmic background spectrum between 0.1 and 1.0 MeV may reveal the turn-on time and the evolution of the rate of Type Ia supernova nucleosynthesis in the universe.

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