Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-26
Astronomy and Astrophysics
Astrophysics
8 pages, 3 figures, invited talk at the COSMO99 conference, Trieste, Italy, Sept. 27 - Oct. 2, 1999
Scientific paper
The late infall of cold dark matter onto an isolated galaxy such as our own produces flows with definite velocity vectors at any physical point in the galactic halo. It also produces caustics which are places where the dark matter density is very large. The outer caustics are topological spheres whereas the inner caustics are rings. The self-similar model of galactic halo formation predicts that the caustic ring radii $a_n$ follow the approximate law $a_n \sim 1/n$. In a recent study of 32 extended and well-measured galactic rotation curves, we found evidence for this law.
Kinney Will
Sikivie Pierre
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