Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394..409b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. 409-421.
Astronomy and Astrophysics
Astrophysics
40
Dark Matter, Galactic Mass, Galactic Structure, Interstellar Matter, Universe, Computerized Simulation, Galactic Evolution, Gravitational Collapse, Gravitational Effects, Luminosity, Many Body Problem
Scientific paper
The mass function of galaxy halos in a cold dark matter universe is determined as a function of environment using large-scale N-body simulations over the halo mass range 10 exp 10 to 10 exp 15 solar masses. The mass function of the halos formed in the high-, low-, and average-density regions of the simulations are well approximated by a power law of index -1.0 +/-0.1 for halo masses in the range 10 exp 10 to 10 exp 13 solar masses. The slope of the mass function in this mass range is independent of environment; the formation of massive galaxy halos is strongly biased towards high-density regions. The mass function predicted by the Press-Schecter formalism does not agree well with the numerical mass function.
Brainerd Tereasa G.
Villumsen Jens Verner
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