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A correlation between spin parameter and dark matter halo mass

Published online by Cambridge University Press:  20 January 2011

H. Wozniak ,
G. Hensler ,
A. Knebe  and
C. Power
A. Knebe
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
C. Power
Affiliation:
Department of Physics and Astronomy, University of Leicester, University Road, LE1 7RH, UK
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Abstract

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.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 44: JENAM 2008: Grand Challenges in Computational Astrophysics , 2010 , pp. 53 - 56
Copyright
© EAS, EDP Sciences 2011

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