The distribution of dark matter in galaxies. II - Neutrino-mass limits

Details The distribution of dark matter in galaxies. II - Neutrino-mass limits The distribution of dark matter in galaxies. II - Neutrino-mass limits

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1253l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Oct. 1989, p. 1253-1259. Research supported by the University of Washington.

Astronomy and Astrophysics

Astronomy

18

Dark Matter, Galactic Structure, Neutrinos, Particle Mass, Astronomical Models, Extremum Values, Halos, Luminosity, Radial Distribution

Scientific paper

If the dark matter in galaxies is composed of one flavor of neutrino, its distribution sets a lower limit to the neutrino mass. To use this constraint, the distribution of dark matter must be modeled. It is shown here that, when models are constructed, the neutrino mass must exceed 19 eV. The dwarf galaxy DDO 154 suggests higher mass limits, but the results are dominated by uncertainties in the distance and the amount of gas in the system. The distribution of dark matter in galaxies currently places no serious constraint on the picture that neutrinos are the dark matter. An additional discriminant between warm and cold dark matter is proposed, namely, the variation of phase density with luminosity.

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