Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63.1057n&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Nov.-Dec. 1986, p. 1057-1072. In Russian.
Astronomy and Astrophysics
Astronomy
8
Anisotropy, Astronomical Models, Neutrinos, Relic Radiation, Universe, Cosmic Plasma, Gamma Ray Astronomy, Gas Ionization, Hydrogen Clouds, Radioactive Decay
Scientific paper
The levels of small-scale anisotropy of the relic electromagnetic radiation are calculated in models with unstable neutrinos. Besides the consideration of standard dynamics of plasma clearing for radiation, the role of the electromagnetic channel of the neutrino decay (with the timescale τ ≈ 1024s) is investigated. It is shown that gamma-ray quanta with energies Eγ ≈ 10 - 100 eV, originating in neutrino decays, are an effective source of hydrogen ionization and provide a considerable lengthening of the plasma clearing period. It is stressed that models with unstable neutrinos, including also the electromagnetic deceay channel, predict an extremely small anisotropy of the relic background ΔT/T ≈ 10-7 - 5×10-8 at angular scales α ≡ 5 minutes of arc.
Naselskij P. D.
Novikov Igor D.
Reznitskij L. I.
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