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News and Views
Nature 456, 44-45 (6 November 2008) | doi:10.1038/456044a; Published online 5 November 2008
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Astrophysics: An illuminating dark halo
Stéphane Colombi1
Abstract
A large simulation reveals that most of the detectable signal from dark matter in our Milky Way probably comes from the main, smooth Galactic halo, rather than from small clumps.
Most of the mass of the Universe is believed to be in the form of dark matter — an invisible component that has so far been only indirectly detected through the effects of its gravity on visible matter. In the theory of supersymmetry in particle physics, there is a corresponding dark-matter-particle candidate that interacts only very weakly with the rest of the Universe, and is thus very difficult to detect directly.
- Stéphane Colombi is at the Institut d'Astrophysique de Paris, CNRS UMR 7095/Université Pierre et Marie Curie, 98 bis boulevard Arago, 75014 Paris, France.
Email: colombi@iap.fr
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