Gravitational radiation dominated cosmologies

Details Gravitational radiation dominated cosmologies Gravitational radiation dominated cosmologies

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241..475z&link_type=abstract

Astrophysical Journal, Part 1, vol. 241, Oct. 15, 1980, p. 475-485.

Mathematics

Logic

30

Astronomical Models, Cosmology, Gravitational Effects, Gravitational Waves, Radiation Effects, Age Factor, Background Radiation, Mass Distribution, Radiant Flux Density, Red Shift

Scientific paper

Robertson-Walker cosmologies with matter, radiation, and nonzero cosmological constant are examined to determine how much high-frequency gravitational radiation may be present at the current epoch without violating observations. Evolutionary limits due to a maximum redshift requirement, minimum age requirement, and magnitude-redshift relation are used to rule out most M2 models and to restrict singular models to those satisfying an acceleration parameter limit of -4.4-5.6, a matter density limit of less than 4.7, and a radiation density limit of less than 3.4. These limits are compared to direct limits from various experimental searches for a cosmic gravitational radiation background; it is found that several experiments are very close to a significant sensitivity.

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