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  On the correlation between the local dark matter and stellar velocities

Bozorgnia, N., Fattahi, A., Cerdeño, D. G., Frenk, C. S., Gómez, F. A., Grand, R. J. J., et al. (2019). On the correlation between the local dark matter and stellar velocities. Journal of Cosmology and Astroparticle Physics, 2020(6): 045. doi:10.1088/1475-7516/2019/06/045.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-720B-E Version Permalink: http://hdl.handle.net/21.11116/0000-0006-720C-D
Genre: Journal Article

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On the correlation between the local dark matter and stellar velocities.pdf (Any fulltext), 7MB
 
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 Creators:
Bozorgnia, Nassim, Author
Fattahi, Azadeh, Author
Cerdeño, David G., Author
Frenk, Carlos S., Author
Gómez, Facundo A., Author
Grand, Robert J. J.1, Author              
Marinacci, Federico, Author
Pakmor, Rüdiger2, Author              
Affiliations:
1Galaxy Formation, Cosmology, MPI for Astrophysics, Max Planck Society, ou_159878              
2Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              

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 Abstract: The dark matter velocity distribution in the Solar neighbourhood is an important astrophysical input which enters in the predicted event rate of dark matter direct detection experiments. It has been recently suggested that the local dark matter velocity distribution can be inferred from that of old or metal-poor stars in the Milky Way. We investigate this potential relation using six high resolution magneto-hydrodynamical simulations of Milky Way-like galaxies of the Auriga project. We do not find any correlation between the velocity distributions of dark matter and old stars in the Solar neighbourhood. Likewise, there are no strong correlations between the local velocity distributions of dark matter and metal-poor stars selected by applying reasonable cuts on metallicity. In some simulated galaxies, extremely metal-poor stars have a velocity distribution that is statistically consistent with that of the dark matter, but the sample of such stars is so small that we cannot draw any strong conclusions.

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Language(s): eng - English
 Dates: 2019-06-21
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: DOI: 10.1088/1475-7516/2019/06/045
Other: LOCALID: 3232670
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Title: Journal of Cosmology and Astroparticle Physics
  Abbreviation : J. Cosmol. Astropart. Phys.
  Abbreviation : JCAP
Source Genre: Journal
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Pages: - Volume / Issue: 2020 (6) Sequence Number: 045 Start / End Page: - Identifier: ISSN: 1475-7516