Massive neutrinos and small-scale anisotropy of the relic electromagnetic radiation

Details Massive neutrinos and small-scale anisotropy of the relic electromagnetic radiation Massive neutrinos and small-scale anisotropy of the relic electromagnetic radiation

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63.1080n&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 63, Nov.-Dec. 1986, p. 1080-1088. In Russian.

Astronomy and Astrophysics

Astronomy

2

Anisotropy, Electromagnetic Radiation, Neutrinos, Relic Radiation, Adiabatic Conditions, Antiparticles, Astronomical Models, Leptons, Particle Density (Concentration)

Scientific paper

Small-scale anisotropy of the relic radiation temperature in the neutrino universe is studied. Consideration is given to the following models: (1) a model of thermodynamic neutrinos with a particle-antiparticle concentration of 109/cu cm, and (2) a model of nonthermodynamic neutrinos, in which the current relative concentration diminishes because of the build-up of radiation entropy during 10-1000 s which is caused by nonstable lepton decay. It is shown that, for a 'flat' spectrum of initial metric perturbations, the relic radiation anisotropy minimum is achieved in the nonthermodynamic neutrino model and is equal to 0.000028 for m(nu) greater than 150 eV.

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