On massive fermions and bosons in galactic halos

Abstract

Galactic halos of massive fermions, of arbitrary half integer spin, or of massive bosons are considered. To give results of astrophysical interest, the fermions with spin s should have a mass m ∼- 10 eV/c 2/(2s + 1) 1 4 , while the bosons a mass in the range from 10 eV/ c 2 to 10 −24eV/ c 2. We also consider galactic halos of more than one fermion species.