Halo occupation distribution

From Wikipedia, the free encyclopedia
Jump to: navigation, search

The halo occupation distribution (HOD) is a parameter of the halo model of galaxy clustering.[1] The halo model provides one view of the large scale structure of the universe as clumps of dark matter, while the HOD provides a view of how galactic matter is distributed within each of the dark matter clumps.[2] The HOD is used to describe three related properties of the halo model: the probability distribution relating the mass of a dark matter halo to the number of galaxies that form within that halo; the distribution in space of galactic matter within a dark matter halo; the distribution of velocities of galactic matter relative to dark matter within a dark matter halo.[3]

See also[edit]


  1. ^ Martinez, Vincent J.; Saar, Enn (2002) [2001]. "Chapter 7: Random Fields in Cosmology". Statistics of the Galaxy Distribution. CRC Press. pp. 232–237. ISBN 1-58488-084-8.  Note: See section 7.8: Halo Model of Galaxy Clustering
  2. ^ Zheng, Zheng; A.A. Berlind; D.H. Weinberg; A.J. Benson; C.M. Baugh; S. Cole; R. Davé; C.S. Frenk; et al. (2005). "Theoretical Models of the Halo Occupation Distribution: Separating Central and Satellite Galaxies". The Astrophysical Journal. 633 (2): 791–809. Bibcode:2005ApJ...633..791Z. arXiv:astro-ph/0408564Freely accessible. doi:10.1086/466510. 
  3. ^ Berlind, Andreas A.; David H. Weinberg (2002). "The Halo Occupation Distribution: Toward an Empirical Determination of the Relation between Galaxies and Mass". Astrophysical Journal. 575 (2): 587–616. Bibcode:2002ApJ...575..587B. arXiv:astro-ph/0109001Freely accessible. doi:10.1086/341469.