Recent heavy-particle decay in a matter-dominated universe

Details Recent heavy-particle decay in a matter-dominated universe Recent heavy-particle decay in a matter-dominated universe

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292....1o&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 1, 1985, p. 1-11. Research supported by the U.S. Department of Ene

Physics

33

Cosmology, Galactic Clusters, Galactic Evolution, Particles, Radioactive Decay, Dark Matter, Mathematical Models, Matter (Physics), Universe, Weak Interactions (Field Theory)

Scientific paper

The cold-matter scenario for galaxy formation solves the dark-matter problem very nicely on small scales corresponding to galaxies and clusters of galaxies. It is, however, difficult to reconcile with a universe with an Einstein-deSitter value of Ω = 1. It is shown here that cold matter and Ω = 1 can be made compatible while retaining the feature that the universe is matter-dominated today. This is done by means of heavy (cold) particles whose decay subsequently leads to the unbinding of a large fraction of lighter clustered matter.

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