Probing the theory of gravity with gravitational lensing of gravitational waves and galaxy surveys
Résumé
The cross-correlation of gravitational wave strain with upcoming galaxy surveys probes theories of gravity in a new way. This method enables testing the theory of gravity by combining the effects from both gravitational lensing of gravitational waves and the propagation of gravitational waves in space–time. We find that within 10 yr the combination of the Advanced LIGO (Laser Interferometer Gravitational-Wave Observatory) and VIRGO (Virgo interferometer) detector networks with planned galaxy surveys should detect weak gravitational lensing of gravitational waves in the low-redshift Universe (z < 0.5). With the next-generation gravitational wave experiments such as Voyager, LISA (Laser Interferometer Space Antenna), Cosmic Explorer, and the Einstein Telescope, we can extend this test of the theory of gravity to larger redshifts by exploiting the synergies between electromagnetic wave and gravitational wave probes.
Mots clés
gravitational wave
large-scale structure of Universe
Weak lensing
gravitational lensing: weak
gravitational waves
gravitation: lens
gravitational radiation: propagation
detector: network
redshift: low
galaxy
Einstein Telescope
cosmological model: parameter space
dark matter: parametrization
dark energy: density
space-time
structure
VIRGO
LISA
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