EAS Publications Series
Volume 44, 2010JENAM 2008: Grand Challenges in Computational Astrophysics
|Page(s)||53 - 56|
|Published online||20 January 2011|
H. Wozniak and G. Hensler (eds)
EAS Publications Series, 44 (2010) 53-56
A correlation between spin parameter and dark matter halo mass
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482
2 Department of Physics and Astronomy, University of Leicester, University Road, LE1 7RH, UK
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 λ 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.
© EAS, EDP Sciences 2011