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On the relation between radial alignment of dark matter subhalos and host mass in cosmological simulations

Published online by Cambridge University Press:  30 May 2009

E. Pécontal ,
T. Buchert ,
Ph. Di Stefano ,
Y. Copin ,
N. Draganova  and
A. Knebe
N. Draganova
Affiliation:
Astrophysical Institute Potsdam, An der Sternwarte 16, Germany
A. Knebe
Affiliation:
Astrophysical Institute Potsdam, An der Sternwarte 16, Germany
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Abstract

We explore the dependence of the radial alignment of subhalos on the mass of the host halo they orbit in. We have 25 well resolved host dark matter halosat our disposal ranging from 1015 h-1 M๏ down to 1012 h-1 M๏. Wenote that the radial alignment is independent of host halo mass and the distribution of cosθ is well fitted by a simple power law P(cosθ) ∝ cos4θ.

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References

Ciotti, L., & Dutta, S.N., 1994, MNRAS, 270, 390 CrossRef
Kuhlen, M., Diemand, J., & Madau, P., 2007, ApJ, 671, 1135 CrossRef