Primordial gravitational waves and the blackbody radiation anisotropy
Abstract
If relict gravitational waves deriving from a chaotic initial singularity contain a nonisotropic component, then this radiation can produce a frame dragging; effect which will induce a dipole anisotropy in the observed temperature distribution of the 3 K electromagnetic radiation background. The measured dipole and quadrupole distributions of the electromagnetic background can thus be used to bound the effective wave parameters of the nonisotropic part of the gravitational background. Using available data, the dimensionless amplitude of this nonisotropic part is found to be less than 0.0005 for wavelengths less than the Hubble radius. The effective energy density of this nonisotropic component of the gravitational radiation background is less than 2 x 10 to the 8th times the critical density.
 Publication:

The Astrophysical Journal
 Pub Date:
 May 1984
 DOI:
 10.1086/184265
 Bibcode:
 1984ApJ...280L..39A
 Keywords:

 Cosmology;
 Gravitational Waves;
 Relic Radiation;
 Anisotropy;
 Dipoles;
 Quadrupoles;
 Astrophysics