Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982azh....59..213b&link_type=abstract
(Astronomicheskii Zhurnal, vol. 59, Mar.-Apr. 1982, p. 213-223.) Soviet Astronomy, vol. 26, Mar.-Apr. 1982, p. 132-138. Transla
Astronomy and Astrophysics
Astronomy
5
Neutrinos, Universe, Density (Number/Volume), Energy Spectra, Galactic Evolution, Solar Neutrinos, Supernovae
Scientific paper
The number density and energy spectrum of 3-30 MeV neutrinos and their influence on a solar neutrino detector are calculated on the basis of recent theoretical estimates for supernova neutrino emission, supernova rate data, and the heavy-element abundance of galactic matter. The evolution of galaxies is taken into account. At present the mass density of such neutrinos in the universe should be 2 to 10 x 10 to the -33rd g/cu cm, greater than the equivalent density of the cosmic background radiation. But unlike matter and the microwave radiation, which probably were created at the start of the cosmological expansion, medium-energy neutrinos would have developed subsequent to star formation at epochs z less than about 10 and would still be produced today. About 20 neutrino pulses should reach the observer each second from supernovae within the volume z less than 1; each pulse would last about 100-1,000,000 sec if the neutrino rest mass is 0-30 eV, and the relative pulsation amplitude would be about 0.01-0.0001.
Bisnovatyj-Kogan G. S.
Seidov Zakir F.
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