Nonlinear gravitational waves,their polarization,and realistic sources |
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Authors: | F Canfora L Parisi G Vilasi |
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Affiliation: | (1) Dipartimento di Fisica “E. R. Caianiello,”, Università di Salerno, INFN, Sezione di Napoli, GC Salerno, Via S. Allende, I-84081 Baronissi (Salerno), Italy |
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Abstract: | We describe exact solutions of the Einstein field equations invariant under a non-Abelian two-dimensional Lie algebra of Killing
fields. A subclass of these gravitational fields have a wavelike character. We show that they have spin 1. We also discuss
some indirect observational effects. In particular, we show that vector cosmological perturbations can no longer be negligible
in the presence of topological defects, which can be verified by examining the anisotropies of the cosmic microwave background.
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 152, No. 2, pp. 225–240, August, 2007. |
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Keywords: | metric Killing vector gravitational wave |
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