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Evidence for Ring Caustics in the Milky Way | Pierre Sikivie
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18 Sep 2001 | Journal: | Phys.Lett. B567 (2003) 1-8 | Subject: | astro-ph hep-ph | Abstract: | The late infall of cold dark matter onto our galaxy produces discrete flows and caustics in its halo. The recently discovered ring of stars near galactocentric distance 20 kpc and a series of sharp rises in the Milky Way rotation curve are interpreted as due to the presence of caustic rings of dark matter in the galactic plane. Their locations are consistent at the 3% level with the predictions of the self-similar infall model for the caustic ring radii. Also, a triangular feature in the IRAS map of the galactic plane is consistent with the imprint of a caustic ring of dark matter upon the baryonic matter. These observations imply that the dark matter in our neighborhood is dominated by a single flow whose density and velocity vector are estimated. | Source: | arXiv, astro-ph/0109296 | Services: | Forum | Review | PDF | Favorites |
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