Observational constraints of sterile neutrinos in galaxies

Details Observational constraints of sterile neutrinos in galaxies Observational constraints of sterile neutrinos in galaxies

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.319..143c&link_type=abstract

Astrophysics and Space Science, Volume 319, Issue 2-4, pp. 143-147

Astronomy and Astrophysics

Astrophysics

Normal Galaxies, Dwarf Galaxies

Scientific paper

We study a model in which degenerate sterile neutrinos account for galactic dark matter. We fit the rotation curves of 5 dwarf galaxies with the degenerate sterile neutrinos in hydrostatic equilibrium. Also we estimate the range of sterile neutrino mass by calculating the upper and lower bounds of the mass densities of sterile neutrino halos in the outermost regions of 21 normal galaxies. The observed rotation curves of 5 dwarf galaxies and 21 normal galaxies are consistent with having sterile neutrinos with mass (26 30) eV, and the similarity of the rotation curves of different galaxies emerges naturally in our model.

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