Radiative decays of massive relic particles and the submillimeter background

Details Radiative decays of massive relic particles and the submillimeter background Radiative decays of massive relic particles and the submillimeter background

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvl..63..117f&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 63, July 10, 1989, p. 117-120. Research supported by NASA.

Physics

15

Background Radiation, Radiative Lifetime, Relic Radiation, Submillimeter Waves, Compton Effect, Cosmology, Neutrinos, Red Shift, Ultraviolet Radiation

Scientific paper

The interaction of the decay photons of an unstable relic particle species with the microwave background radiation is considered. The radiative decays of these particles delay recombination and serve as an energy source for the resultant plasma. Nonrelativistic Compton scattering by these electrons couples the decay photons to the microwave background, producing submillimeter distortions. If the decay products close the universe, they must decay with a radiative branching ratio larger than 2.5 x 10 to the -5th in order to produce recently observed excess submillimeter background radiation. To be consistent with measurements of the UV background, their mass m is much greater than 114 keV and their decay redshift z is much greater than 5200.

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