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A dark disc in the Milky Way

Read, J. I. ; Lake, G. ; Agertz, O. LU and Debattista, V. (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.

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Please use this url to cite or link to this publication:
author
; ; and
publishing date
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}},
}