Talk:Dark matter halo

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[edit] Scale of halo

It is my understanding that there are two uses for the term "dark matter halo". The small-scale use is addressed here, where an individual galaxy can be defined in terms of it's luminous and dark matter components, the latter far greater in mass and volume than the former. The large-scale use of the term is addressed in part in Halo Occupation Distribution (HOD), where the large scale structure of the universe can be characterized as bubbles of dark matter or 'halos' in which form multiple galaxies, the HOD going to describe the galactic mass distribution in relation to an individual 'halo'. I think it would be useful for these concepts to be reconciled with one another to the benefit of the general public. Note that I did not start the Halo Occupation Distribution article, but rewrote it and added references. Regards, --User:Ceyockey (talk to me) 00:48, 16 December 2007 (UTC)