Dwarf spheroidal galaxies and the mass of the neutrino

Ortwin E. Gerhard, David N. Spergel

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


We argue that neutrinos cannot provide the missing mass in Draco and Ursa Minor, since for reasonable neutrino mass (mν ∼ 30 eV) phase-space limits would then require very large core radii (∼10 kpc) and masses (∼4 × 1011 M) for these dwarfs, which would make their dynamical friction decay times in the Galactic halo significantly shorter than a Hubble time. These limits are insensitive to assumptions about the anisotropy of the neutrino distribution.

Original languageEnglish (US)
Pages (from-to)L9-L11
JournalAstrophysical Journal
Issue number1 PART 2
StatePublished - Apr 10 1992

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Dark matter
  • Galaxies: local group


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