Unstable matter and the 1-0 MeV gamma-ray background

Details Unstable matter and the 1-0 MeV gamma-ray background Unstable matter and the 1-0 MeV gamma-ray background

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324l..47d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. L47-L50. NASA-supported rese

Statistics

Computation

9

Background Radiation, Cosmic Rays, Dark Matter, Elementary Particles, Extragalactic Radio Sources, Gamma Rays, Computational Astrophysics, Cosmology, Red Shift

Scientific paper

The spectrum of photons produced by an unstable particle which decayed while the universe was young is calculated. This spectrum is compared to that of the 1-10 MeV shoulder, a feature of the high-energy, extragalactic gamma-ray background, whose origin has not yet been determined. The calculated spectrum contains two parameters which are adjusted to obtain a maximal fit to the observed spectrum; the fit thus obtained is accurate to the 99 percent confidence level. The implications for the mass, lifetime, initial abundance, and branching ratio of the unstable particle are discussed.

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