Phase-space constraints on bosonic and fermionic dark matter

Details Phase-space constraints on bosonic and fermionic dark matter Phase-space constraints on bosonic and fermionic dark matter

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..64.2744m&link_type=abstract

Physical Review Letters, Volume 64, Issue 23, June 4, 1990, pp.2744-2746

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Particle-Theory And Field-Theory Models Of The Early Universe, Other Particles

Scientific paper

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.

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