Using gravitational lenses to detect gravitational waves

Details Using gravitational lenses to detect gravitational waves Using gravitational lenses to detect gravitational waves

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gregr..22.1447a&link_type=abstract

General Relativity and Gravitation, Volume 22, Issue 12, pp.1447-1455

Physics

8

Scientific paper

Gravitational lenses could be used to detect gravitational waves, because a gravitational wave affects the travel-time of a light ray. In a gravitational lens, this effect produces time-delays between the different images. Thus the bending of light, which was the first experimental confirmation of Einstein's theory, can be used to search for gravitational waves, which are the most poorly confirmed aspect of that same theory. Applying this method to the gravitational lens 0957+561 gives new upper bounds on the amplitude of low-frequency gravitational waves in the universe, and new limits on the energy-density during an early “inflationary” phase.

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