Halo occupation distribution

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

* Dark matter
* Large-scale structure of the cosmos
* Galaxy formation and evolution

## References

1. ↑ Martinez, Vicent J.; Saar, Enn (2002). "Chapter 7: Random Fields in Cosmology". Statistics of the Galaxy Distribution. CRC Press. pp. 232-237. ISBN 978-1-58488-084-4. https://books.google.com/books?id=f-l9bB-7AQMC&pg=PA187. 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. doi:10.1086/466510. Bibcode: 2005ApJ...633..791Z.
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. doi:10.1086/341469. Bibcode: 2002ApJ...575..587B.

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