CMB Anisotropy in the Decaying Neutrino Cosmology

Details CMB Anisotropy in the Decaying Neutrino Cosmology CMB Anisotropy in the Decaying Neutrino Cosmology

1998-05-08

arxiv.org/abs/astro-ph/9805108v3

Mon.Not.Roy.Astron.Soc.301:210-214,1998

Astronomy and Astrophysics

Astrophysics

4 pages (uses mn.sty) incl. 4 figures (epsf); Changes: additional clarifying remarks; Accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.1998.02017.x

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} sec. In such a cosmology the universe is reionized 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 and PLANCK surveyor missions.

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