Multiple imaging by gravitational waves

Details Multiple imaging by gravitational waves Multiple imaging by gravitational waves

1997-07-21

arxiv.org/abs/astro-ph/9707236v1

Int.J.Mod.Phys. D7 (1998) 409-429

Astronomy and Astrophysics

Astrophysics

23 pages, LaTeX, no figures, to appear in Int. J. Mod. Phys. D

Scientific paper

10.1142/S0218271898000267

Gravitational waves act like lenses for the light propagating through them. This phenomenon is described using the vector formalism employed for ordinary gravitational lenses, which was proved to be applicable also to a non-stationary spacetime, with the appropriate modifications. In order to have multiple imaging, an approximate condition analogous to that for ordinary gravitational lenses must be satisfied. Certain astrophysical sources of gravitational waves satisfy this condition, while the gravitational wave background, on average, does not. Multiple imaging by gravitational waves is, in principle, possible, but the probability of observing such a phenomenon is extremely low.

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