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Oscar Agertz. Profile photo.

Oscar Agertz

Associate Professor / Senior university lecturer / Wallenberg Academy Fellow

Oscar Agertz. Profile photo.

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

Summary, in English

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.

Publishing year







Hunting for the Dark : The Hidden Side of Galaxy Formation - Proceedings of the International Conference



Document type

Conference paper


American Institute of Physics (AIP)

Conference name

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

Conference date

2009-10-19 - 2009-10-23

Conference place

Qawra, Malta




  • ISBN: 9780735407862