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arxiv: 2005.09607 · v3 · pith:KAB2LDWCnew · submitted 2020-05-19 · 🌀 gr-qc

Multiparameter tests of general relativity using multiband gravitational-wave observations

Anuradha Gupta , Sayantani Datta , Shilpa Kastha , Ssohrab Borhanian , K. G. Arun , B. S. Sathyaprakash This is my paper
classification 🌀 gr-qc
keywords generalmultibandobservationsrelativityboundscoefficientslisamultiparameter
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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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