The large-scale microwave-background anisotropy in unstable-particle cosmologies

Details The large-scale microwave-background anisotropy in unstable-particle cosmologies The large-scale microwave-background anisotropy in unstable-particle cosmologies

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..419k&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, June 1986, p. 419-428) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, May-June

Astronomy and Astrophysics

Astronomy

8

Cosmology, Elementary Particles, Radioactive Decay, Relic Radiation, Anisotropy, Cosmic Rays, Gravitinos, Neutrinos, Temperature Distribution

Scientific paper

The large-scale anisotropy of the temperature of the relic background electromagnetic radiation caused by adiabatic perturbations with flat initial spectrum in the flat Friedmann model with unstable massive particles is calculated. The multipole structure of ΔT/T differs significantly from those obtained in the standard neutrino model or the cold particle model. The upper limit on the moment of decay of unstable neutrinos or gravitinos Zd < 3 - 4 is obtained using observational upper bounds on ΔT/T over the range 6 - 180°.

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