• Corpus ID: 1532068

Spin Profile of Galactic Halos and Disk Formation

  title={Spin Profile of Galactic Halos and Disk Formation},
  author={Avishai Dekel and James S Bullock and Cristiano Porciani and Andrey V. Kravtsov and Tsafrir Kolatt and Anatoly Klypin and J. R. Primack Hebrew University and Ohio State and New Mexico State and UC Santa Cruz},
  journal={arXiv: Astrophysics},
We summarize recent developments in the study of the origin of halo spin profiles and preliminary implications on disk formation. The specific angular-momentum distributions within halos in N-body simulations match a universal shape, M(<j) \propto j/(j_0+j). It is characterized by a power law over most of the mass, and one shape parameter in addition to the spin parameter \lambda. The angular momentum tends to be aligned throughout the halo and of cylindrical symmetry. Even if angular momentum… 
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