Non-zero rest mass neutrinos and the cosmological constant |
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| Authors: | C Sivaram |
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| Institution: | (1) Indian Institute of Astrophysics, Bangalore, India |
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| 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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