Mathematics – Logic
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..439s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 10, 1992, p. 439-442.
Mathematics
Logic
17
Cosmology, Dark Matter, Microwaves, Relic Radiation, Anisotropy, Quadrupoles, Temperature Distribution, Universe
Scientific paper
The existence of a scalar field is favorable in the early universe. After the epoch of the inflation, the energy density of the scalar field should decrease and might behave as a time-variable cosmological constant. Using recent observations for the isotropy of the cosmic background radiation, constraints are obtained on cosmological models with the time-variable cosmological constant. It is shown that there is a possibility for the cold dark matter-dominated universe models with initially scale-invariant adiabatic perturbations to realize a spatially flat, low-density universe. To explain the long life of globular clusters, however, a very long-lived scalar field is desirable.
Sato Katsuhiko
Sugiyama Naoshi
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