Multiparameter tests of general relativity using multiband gravitational-wave observations

ORAL

Abstract

In this talk we will demonstrate 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 multi-parameter bounds would play a pivotal role in constraining the parameter space of modified theories of gravity beyond general relativity

*PHY-1836779, AST-1716394,AST-1708146

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Authors

  • Anuradha Gupta

    • University of Mississippi

  • Sayantani Datta

    • Chennai Mathematical Institute, Siruseri, 603103, India

  • Shilpa Kastha

    • Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Callinstraße 38, D–30167 Hannover, Germany

  • Ssohrab Borhanian

    • Pennsylvania State University

  • K.G. Arun

    • Chennai Mathematical Institute
    • Chennai Mathematical Institute, Siruseri, 603103, India

  • B.S. Sathyaprakash

    • Pennsylvania State University
    • Pennsylvania State University, Cardiff University