Observational constraints of sterile neutrinos in galaxies

Man Ho CHAN, Ming Chung CHU

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1 Citation (Scopus)

Abstract

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. Copyright © 2008 Springer Science+Business Media B.V.
Original languageEnglish
Pages (from-to)143-147
JournalAstrophysics and Space Science
Volume319
Issue number2-4
DOIs
Publication statusPublished - Feb 2009

Citation

Chan, M. H., & Chu, M.-C. (2009). Observational constraints of sterile neutrinos in galaxies. Astrophysics and Space Science, 319(2-4), 143-147. doi: 10.1007/s10509-008-9961-x

Keywords

  • Normal galaxies
  • Dwarf galaxies

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