Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341...26e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 341, June 1, 1989, p. 26-40. Research supported by the Miller Foundation fo
Astronomy and Astrophysics
Astrophysics
30
Dark Matter, Dwarf Galaxies, Elliptical Galaxies, Galactic Evolution, Galactic Structure, Hubble Constant, Abundance, Dynamic Models, Halos, Luminosity, Morphology
Scientific paper
A method for calculating the separate mass functions for disk, spheroid, and dwarf galaxies in hierarchical clustering models is applied to galaxy formation in the cold dark matter model to test theories of the origin of the major Hubble types. The procedure yields a galaxy distribution at a given redshift by combining the Press Schechter estimate of the halo mass function, simplified dynamics based on the spherical top-hat prescription, and fractions based on physical criteria and a Gaussian distribution of overdensities. Dwarf galaxies are defined as those galaxies which form within haloes with virial temperatures below about 10 to the 5.4 K. Also, two models are presented to differentiate between elliptical and spiral galaxies.
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