A correlation between spin parameter and dark matter halo mass

Details A correlation between spin parameter and dark matter halo mass A correlation between spin parameter and dark matter halo mass

2008-11-27

arxiv.org/abs/0811.4490v1

Astronomy and Astrophysics

Astrophysics

4 pages, proceedings of the JENAM 2008, Symp. 7

Scientific paper

Using a set of high-resolution dark matter only cosmological simulations we found a correlation between the dark matter halo mass M and its spin parameter lambda for objects forming at redshifts z > 10: the spin parameter decreases with increasing mass. However, halos forming at later times do not exhibit such a strong correlation, in agreement with the findings of previous studies. While we presented such a correlation in a previous study using the Bullock et al. (2001) spin parameter defintion we now defer to the classical definition showing that the results are independent of the definition.

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