A dark disc in the Milky Way
(2008) In Astronomical Notes - Astronomische Nachrichten 329(9-10). p.1022-1024- Abstract
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... (More)
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.
(Less)
- author
- Read, J. I. ; Lake, G. ; Agertz, O. LU and Debattista, V.
- publishing date
- 2008-12-01
- type
- Contribution to journal
- publication status
- published
- keywords
- Dark matter, Galaxy: evolution
- in
- Astronomical Notes - Astronomische Nachrichten
- volume
- 329
- issue
- 9-10
- pages
- 3 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:57149139439
- ISSN
- 0004-6337
- DOI
- 10.1002/asna.200811082
- language
- English
- LU publication?
- no
- id
- 172e2bf7-6d75-4085-98c3-35cbddd96cc5
- date added to LUP
- 2019-02-07 11:24:59
- date last changed
- 2022-01-31 17:27:17
@article{172e2bf7-6d75-4085-98c3-35cbddd96cc5, abstract = {{<p>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 ρ<sub>HALO</sub> 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.</p>}}, author = {{Read, J. I. and Lake, G. and Agertz, O. and Debattista, V.}}, issn = {{0004-6337}}, keywords = {{Dark matter; Galaxy: evolution}}, language = {{eng}}, month = {{12}}, number = {{9-10}}, pages = {{1022--1024}}, publisher = {{John Wiley & Sons Inc.}}, series = {{Astronomical Notes - Astronomische Nachrichten}}, title = {{A dark disc in the Milky Way}}, url = {{http://dx.doi.org/10.1002/asna.200811082}}, doi = {{10.1002/asna.200811082}}, volume = {{329}}, year = {{2008}}, }