Phase-space constraints on bosonic and fermionic dark matter
Journal Article
·
· Physical Review Letters; (USA)
- Institute of Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark (DK)
The widely used Tremaine-Gunn phase-space constraint giving lower-mass limits for neutrino dark matter is extended to bosons. The occupation number for a boson gas does not in general have a maximum, but only a small fraction primordial bosons in equilibrium have large occupation numbers. Dark galaxy halos formed dissipationlessly from primordial bosons therefore have fairly low coarse-grained phase-space number densities. This leads to mass lower limits in the eV range for bosonic dark-matter candidates, only slightly smaller than for fermions.
- OSTI ID:
- 7097477
- Journal Information:
- Physical Review Letters; (USA), Vol. 64:23; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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