Dark matter and formation of large-scale structure in the universe - Composition of dark matter and clustering scenario

Details Dark matter and formation of large-scale structure in the universe - Composition of dark matter and clustering scenario Dark matter and formation of large-scale structure in the universe - Composition of dark matter and clustering scenario

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985sssmp..28..301f&link_type=abstract

Scientia Sinica, Series A - Mathematical, Physical, Astronomical and Technical Sciences (ISSN 0253-5831), vol. 28, March 1985, p

Astronomy and Astrophysics

Astrophysics

2

Mass Distribution, Matter (Physics), Missing Mass (Astrophysics), Particle Interactions, Universe, Evolution (Development), Red Shift, Weak Interactions (Field Theory)

Scientific paper

The clustering of visible and dark matter in the universe is investigated theoretically. It is demonstrated that inhomogeneities developing in the nondominant visible component are always larger than those of the dominant component for scales less than the Jeans scale length of the dominant component, and that this finding implies the existence of at least two nonbaryonic dark-matter components, one with weakly interacting particles of a few eV and one with keV-mass particles which interact even more weakly. Such a model is found to account for the observed 100-Mpc inhomogeneity in the distribution of galaxies (like the neutrino-dominated models) as well as the existence of small-scale structures of redshift greater than 2 (implying their formation before large-scale clustering) and the more uniform distribution of dark matter than visible matter.

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