Is the Dark Disc contribution to Dark Matter Signals important ?

Abstract

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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• What mass are the smallest protohalos?
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Cited by in corpus (22)

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• Readout strategies for directional dark matter detection beyond the neutrino background
• Exothermic Double-Disk Dark Matter
• Assessing the discovery potential of directional detection of Dark Matter
• Dependence of direct detection signals on the WIMP velocity distribution
• Can CoGeNT and DAMA Modulations Be Due to Dark Matter?
• Search for a Non-Relativistic Component in the Spectrum of Cosmic Rays at Earth
• Markov Chain Monte Carlo analysis to constrain Dark Matter properties with directional detection
• Dark matter astrophysical uncertainties and the neutrino floor
• Dark Matter Direct Search Rates in Simulations of the Milky Way and Sagittarius Stream
• Quantifying Astrophysical Uncertainties on Dark Matter Direct Detection Results
• Impact of Dark Matter Velocity Distributions on Capture Rates in the Sun
• Dark Matter Indirect Signatures
• 10 GeV dark matter candidates and cosmic-ray antiprotons
• Direct Detection of Dynamical Dark Matter
• Dark Matter Trapping by Stellar Bars: The Shadow Bar
• Is a co-rotating Dark Disk a threat to Dark Matter Directional Detection ?
• Comparing readout strategies to directly detect dark matter
• Dark matter variations