halo occupation distribution (HOD) — An Etymological Dictionary of Astronomy and Astrophysics

halo occupation distribution (HOD)

واباژش ِ هگش ِ هاله

vâbâžeš-e hageš-e hâlé

Fr.: distribution d'occupation de halo

The → probability distribution of the → number of galaxies
that a host → dark matter halo of a given mass contains. HOD is a powerful theoretical frame to populate dark matter halos with luminous galaxies. More specifically, it describes the bias between galaxies and dark matter by specifying (a) the probability P(N|M) that a halo of → virial mass M contains N galaxies of a particular class and (b) the relative spatial and velocity distributions of galaxies and dark matter within halos.

See also: → halo; → occupation; → distribution.

An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک