Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-11-10
Mon.Not.Roy.Astron.Soc.305:1-14,1999
Astronomy and Astrophysics
Astrophysics
13 pages, LaTeX, 10 postscript figures. To appear in MNRAS. Changed to MNRAS format with inlined figures. Minor changes in tex
Scientific paper
10.1046/j.1365-8711.1999.02154.x
We investigate several approaches for constructing Monte Carlo realizations of the merging history of virialized dark matter halos (``merger trees'') using the extended Press-Schechter formalism. We describe several unsuccessful methods in order to illustrate some of the difficult aspects of this problem. We develop a practical method that leads to the reconstruction of mean quantities such as the conditional and overall mass functions as given by the Press-Schechter model. This method is convenient, computationally efficient, and works for any power spectrum or background cosmology. In addition, we investigate statistics that describe the distribution of the number of progenitors and their masses as a function of redshift.
Kolatt Tsafrir S.
Somerville Rachel S.
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