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Is the dark disc contribution to dark matter signals important?

par Ling, Fu-Sin
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 82, 2, 023534
Publication Publié, 2010-07

Article révisé par les pairs

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Résumé :

Recent N-body simulations indicate that a thick disc of dark matter, corotating with the stellar disc, forms in a galactic halo after a merger at a redshift z<2. The existence of such a dark disc component in the Milky Way could affect dramatically dark matter signals in direct and indirect detection. In this letter, we discuss the possible signal enhancement in connection with the characteristics of the local velocity distributions. We argue that the enhancement is rather mild, but some subtle effects may arise. In particular, the annual modulation observed by DAMA becomes less constrained by other direct detection experiments. © 2010 The American Physical Society.