Oscar Agertz
Associate Professor / Senior university lecturer / Wallenberg Academy Fellow
A dark disc in the Milky Way
Author
Summary, in English
Predicting the flux of dark matter particles through the Earth is vital for current and future direct dark matter detection experiments. To date, such predictions have been based on simulations that model the dark matter alone. Here we make the first attempt to include the influence of the baryonic matter. We show that the presence of a stellar/gas disc at high redshift (z ∼ 1) causes merging satellites to be preferentially dragged towards the disc plane. This results in an accreted stellar disc, and a dark matter disc that contributes PDDISO = 0.25-1 ρHALO at the solar position. Although not likely to be dynamically interesting, the dark disc has important implications for the direct detection of dark matter because of its low velocity with respect to the Earth.
Publishing year
2008-12-01
Language
English
Pages
1022-1024
Publication/Series
Astronomical Notes - Astronomische Nachrichten
Volume
329
Issue
9-10
Document type
Journal article
Publisher
John Wiley & Sons Inc.
Keywords
- Dark matter
- Galaxy: evolution
Status
Published
ISBN/ISSN/Other
- ISSN: 0004-6337