Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398...33v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 398, no. 1, p. 33-42.
Astronomy and Astrophysics
Astrophysics
84
Dark Matter, Galactic Evolution, Universe, Astronomical Models, Power Spectra, Red Shift, Transfer Functions
Scientific paper
We examine the effect of a small admixture of hot dark matter (HDM) to the 'standard' cold dark matter (CDM) model for galaxy formation. With equal amounts of HDM and CDM, the growth of galactic scale density peaks in the CDM component is highly damped and galaxy formation is problematic, as has been discussed elsewhere. However, if the HDM contribution is less than about 30 percent, then the damping is not so severe and galaxies can still form by a reasonable redshift. Further, with this amount of HDM, agreement with large-scale structure observations are greatly improved over that of pure CDM. In this paper we demonstrate this by comparing the predictions of CDM and cold plus hot dark matter models with the most recent observations. We will consider galactic cluster correlations, large-scale peculiar velocity flows, observationally derived power spectra, and the likelihood of finding a Great Attractor-size object.
Schaefer Robert K.
van Dalen Anthony
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