Plane waves in the bimetric gravitation theory.
Abstract
Field equations for plane waves are set up and some solutions are obtained. Transverse, longitudinal, and mixed waves are possible. In the purely transverse case the energy density is positive definite. In the purely longitudinal case it may be negative. However, in one example investigated it is positive if the Riemannian metric tensor satisfies a condition corresponding to spacetime having satisfactory physical properties.
 Publication:

General Relativity and Gravitation
 Pub Date:
 July 1978
 DOI:
 10.1007/BF00761003
 Bibcode:
 1978GReGr...9..575G
 Keywords:

 Gravitation Theory;
 Plane Waves;
 SpaceTime Functions;
 Field Theory (Physics);
 Flux Density;
 Longitudinal Waves;
 Transverse Waves;
 Astrophysics;
 Gravitation Theory