This is the astro-ph blog of the Theoretical Modelling of Cosmic Structures group (TMoX) at the Max-Planck-Institute for Extraterrestrial Physics. We are an independent Max-Planck Research Group focusing on the various aspects in the formation and evolution of galaxies. Part of our focus is on the formation and evolution of early-type galaxies, super-massive black holes, the formation of the first structures in the universe and the enrichment history of the Universe. We are theoreticians using analytic modelling as well as numerical simulations in our work.

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11 February 2011

The Halo Occupation Distribution of Black Holes

Authors: Colin DeGraf, Matthew Oborski, Tiziana Di Matteo, Suchetana Chatterjee, Daisuke Nagai, Zheng Zheng, Jonathan Richardson
http://arxiv.org/abs/1102.1437

This paper investigates the halo occupation distribution (HOD) of black holes within a hydrodynamic cosmological simulation that directly follows black hole growth. Functional fits are derived for the number of BH per halo mass,  the conditional mass function of BHs, and the radial distribution of BHs.
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1 comment:

  1. eyal11 February 2011 at 15:27

    It would be interesting to see in Fig. 1 the number of subhalos above the threshold mass for seed BHs.

    There are a few unclear issues about fig. 7:
    - how come the fraction for the most massive halos is small?
    - why the fraction rise at z=1 and low halo masses?
    - how the population of massive BHs is distributed over the range of halo mass?

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