Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.201101
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Funding
- NSF [PHY-1836779, AST-1716394, AST-1708146]
- Infosys Foundation
- Swarnajayanti Grant DST-India [DST/SJF/PSA-01/2017-18]
- SERB [EMR/2016/005594]
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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 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.
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