Annihilating cold dark matter
Phys Rev Lett
; 85(16): 3335-8, 2000 Oct 16.
Article
en En
| MEDLINE
| ID: mdl-11030890
ABSTRACT
Structure formation with cold dark matter (CDM) predicts halos with a central density cusp, which are observationally disfavored. If CDM particles have an annihilation cross section sigmav approximately 10(-29)(m/GeV) cm(2), then annihilations will soften the cusps. We discuss plausible scenarios for avoiding the early Universe annihilation catastrophe that could result from such a large cross section. The predicted scaling of core density with halo mass depends upon the velocity dependence of sigmav, and s-wave annihilation leads to a core density nearly independent of halo mass, which seems consistent with observations.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2000
Tipo del documento:
Article
País de afiliación:
Estados Unidos