Neutrino Degeneracy and Chemically Inhomogeneous Universe

Details Neutrino Degeneracy and Chemically Inhomogeneous Universe Neutrino Degeneracy and Chemically Inhomogeneous Universe

1999-01-22

arxiv.org/abs/astro-ph/9901318v1

Astronomy and Astrophysics

Astrophysics

7 pages, latex twice; presented at COSMO-98, Monterey, USA, November, 1998

Scientific paper

10.1063/1.59400

A possibility that the universe may be strongly inhomogeneous chemically, while very smooth energetically, is considered. A possible mechanism which could lead to such a picture is a large and inhomogeneous lepton asymmetry. The model may explain possibly observed variation of primordial deuterium by an order of magnitude and predicts helium-rich and possibly helium-poor regions where the helium mass fraction differs from the observed 25% by a factor of 2 in either direction. Helium variation can be observed by a different dumping rate of CMB angular spectrum at small angles at different patches of the sky.

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