Massive neutrino halos in an expanding universe

Details Massive neutrino halos in an expanding universe Massive neutrino halos in an expanding universe

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...114..219f&link_type=abstract

Astronomy and Astrophysics, vol. 114, no. 2, Oct. 1982, p. 219-232.

Astronomy and Astrophysics

Astrophysics

19

Astronomical Models, Big Bang Cosmology, Halos, Neutrinos, Particle Mass, Universe, Anisotropic Media, Capture Effect, Condensing, Cosmic Gases, Gravitational Effects

Scientific paper

The growth of massive neutrino halos around a mass condensation in an expanding universe is considered using the simplified model of an Einstein-Straus universe. This model illustrates the possibility of capturing freely moving particles in a homogeneous and isotropic cosmological gas by the local gravitational field of a mass condensation. This capture process is particularly relevant to the neutrino background in a neutrino dominated universe and explicit formulas are given relating the maximum capture rate by a neutrino condensation to the cosmological redshift and the mass of the condensation. Analogies between self-gravitating systems of neutrinos in an asymptotically flat spacetime and the condensations which maximize the capture rate are noted and observational consequences are considered.

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