Abstract
Recently it was pointed out that a non-zero cosmological constant can play a role in the formation of neutrino halos only in the case of neutrinos of very low rest mass (m v <-0.1eV). However, phase-space considerations would requirem v >50 eV if neutrinos dominate the missing mass in halos of large spiral galaxies and moreoverm v >200 eV is implied in the case of dwarf spheroidals. These larger neutrino masses would be in conflict with observed constraints on the age of the Universe unless a cosmological constant is invoked.
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Sivaram, C. Non-zero rest mass neutrinos and the cosmological constant. Astrophys Space Sci 116, 39–42 (1985). https://doi.org/10.1007/BF00649271
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DOI: https://doi.org/10.1007/BF00649271