Is the Dark Disc contribution to Dark Matter Signals important ?

Details Is the Dark Disc contribution to Dark Matter Signals important ? Is the Dark Disc contribution to Dark Matter Signals important ?

2009-11-12

arxiv.org/abs/0911.2321v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Scientific paper

Recent N-body simulations indicate that a thick disc of dark matter, co-rotating 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.

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