Multiparameter Tests of General Relativity Using Multiband Gravitational-Wave Observations

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

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


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 coefficients. Multiband observations would measure most of the known post-Newtonian phasing coefficients to an accuracy below a few percent - 2 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.

Original languageEnglish (US)
Article number201101
JournalPhysical review letters
Issue number20
StatePublished - Nov 10 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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