A dark matter disc in the milky way

J. I. Read, T. Bruch, L. Baudis, V. P. Debattista, O. Agertz, L. Mayer, A. M. Brooks, F. Governato, A. H.G. Peter, G. Lake

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Dark matter direct detection experiments need to know the local phase space density of dark matter fdm(r,v,t) in order to derive dark matter particle properties. To date, calculations for fdm(r,v,t) have been based on simulations that model the dark matter alone. Here we include the influence of the baryonic matter. We find that a star/gas disc at high redshift (z∼1) causes merging satellites to be preferentially dragged towards the disc plane. This results in an accreted dark matter disc that contributes ∼0.25-1 times the non-rotating halo density at the Solar position. We discuss the impact of the dark disc on dark matter direct detection experiments, and how we might be able to detect it in future Galactic surveys.

Original languageEnglish (US)
Title of host publicationHunting for the Dark
Subtitle of host publicationThe Hidden Side of Galaxy Formation - Proceedings of the International Conference
PublisherAmerican Institute of Physics Inc.
Number of pages4
ISBN (Print)9780735407862
StatePublished - 2010
EventInternational Conference "Hunting for the Dark: The Hidden Side of Galaxy Formation" - Qawra, Malta
Duration: Oct 19 2009Oct 23 2009

Publication series

NameAIP Conference Proceedings


OtherInternational Conference "Hunting for the Dark: The Hidden Side of Galaxy Formation"

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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