Open AccessCosmic microwave background anisotropy in the decaying neutrino cosmology
Author(s) -
Adams J. A.,
Sarkar S.,
Sciama D. W.
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.02017.x
Subject(s) - physics , cosmic microwave background , cosmology , neutrino , astrophysics , planck , cosmic background radiation , observational cosmology , anisotropy , cosmic neutrino background , astronomy , spectral density , universe , cosmic cancer database , big bang (financial markets) , neutrino detector , dark energy , particle physics , neutrino oscillation , quantum mechanics , statistics , mathematics , finance , economics
It is attractive to suppose for several astrophysical reasons that the Universe has close to the critical density in light (∼30 eV) neutrinos which decay radiatively with a lifetime of ∼10 23 s. In such a cosmology the Universe is re‐ionized early and the last scattering surface of the cosmic microwave background significantly broadened. We calculate the resulting angular power spectrum of temperature fluctuations in the cosmic microwave background. As expected, the acoustic peaks are significantly damped relative to the standard case. This would allow a definitive test of the decaying neutrino cosmology with the forthcoming MAP Planck surveyor missions.