Inhomogeneous cosmology - Gravitational radiation in Bianchi backgrounds

An exact formalism is developed for describing cosmological models with strong, long wavelength gravitational waves of general polarization propagating over backgrounds corresponding to Bianchi types I through VII. We introduce and discuss a new metric which exhibits the appropriate symmetries of tw...

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Veröffentlicht in:Astrophys. J.; (United States) 1982-02, Vol.253, p.1
Hauptverfasser: Adams, P. J., Hellings, R. W., Zimmerman, R. L., Farhoosh, H., Levine, D. I., Zeldich, S.
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Sprache:eng
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Zusammenfassung:An exact formalism is developed for describing cosmological models with strong, long wavelength gravitational waves of general polarization propagating over backgrounds corresponding to Bianchi types I through VII. We introduce and discuss a new metric which exhibits the appropriate symmetries of two equivalent independent polarizations of gravitational waves. The formalism is applied to an empty type I cosmology, and it is shown how the original z-dependent chaotic singularity structure transforms itself into gravitational radiation propagating along the z-axis in a Bianchi I background.
ISSN:0004-637X
1538-4357
DOI:10.1086/159604