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arXiv · 2005.09607

Multiparameter tests of general relativity using multiband gravitational-wave observations

Anuradha Gupta·Sayantani Datta·Shilpa Kastha·Ssohrab Borhanian·K. G. Arun·B. S. Sathyaprakash
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Abstract

In this Letter we show that multiband observations of stellar-mass binary black holes by the next generation of ground-based observatories (3G) and the space-based Laser Interferometer Space Antenna (LISA) would facilitate a comprehensive test of general relativity by simultaneously measuring all the post-Newtonian (PN) coefficients. Multiband observations would measure most of the known PN phasing coefficients to an accuracy below a few percent---two orders-of-magnitude better than the best bounds achievable from even `golden' binaries in the 3G or LISA bands. Such multiparameter bounds would play a pivotal role in constraining the parameter space of modified theories of gravity beyond general relativity.

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Anuradha Gupta, Sayantani Datta, Shilpa Kastha, Ssohrab Borhanian, K. G. Arun, B. S. Sathyaprakash. 2020-05-19. Multiparameter tests of general relativity using multiband gravitational-wave observations. https://doi.org/10.1103/physrevlett.125.201101

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