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Neutrino Mass Limits and Dark Halos

Published online by Cambridge University Press:  04 August 2017

Jes Madsen  and
Richard Epstein
Jes Madsen
Affiliation:
Institute of Astronomy, Aarhus, Denmark
Richard Epstein
Affiliation:
Los Alamos National Laboratory, USA

Extract

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Lower mass limits for particles constituting the dark matter in galaxy halos can be derived from considerations of the initial and final phase space distribution. In the case of massive neutrinos, Tremaine and Gunn (1979) pointed out that the initial fine-grained occupation number of cosmological neutrinos and therefore the final coarse-grained phase space occupation, is less than 0.5. From this they were able to show that if the final neutrino distribution is an isothermal sphere, one can put lower limits on the neutrino mass from assumptions about the core radius of the neutrino sphere.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 117: Dark Matter in the Universe , 1987 , pp. 163
Copyright
Copyright © Reidel 1987 

References

Madsen, J., and Epstein, R.I., Ap. J. 282, 11 (1984).CrossRefGoogle Scholar
Madsen, J., and Epstein, R.I., Phys. Rev. Lett. 54, 2720 (1985).CrossRefGoogle Scholar
Tremaine, S., and Gunn, J.E., Phys. Rev. Lett. 42, 407 (1979).CrossRefGoogle Scholar