Testing post-Newtonian theory with gravitational wave observations
K.G. Arun, B.R. Iyer, M.S.S. Qusailah, B.S. Sathyaprakash
TL;DR
LISA's observations of supermassive black hole mergers enable high-precision tests of Einstein's gravity, allowing exploration of the non-linear aspects of post-Newtonian theory within and beyond general relativity.
Contribution
This paper demonstrates how LISA can be used to test the non-linear structure of post-Newtonian gravity with unprecedented precision.
Findings
LISA can achieve high signal-to-noise ratios for black hole mergers.
LISA enables probing of non-linear post-Newtonian effects.
Potential to test alternative theories of gravity.
Abstract
The Laser Interferometric Space Antenna (LISA) will observe supermassive black hole binary mergers with amplitude signal-to-noise ratio of several thousands. We investigate the extent to which such observations afford high-precision tests of Einstein's gravity. We show that LISA provides a unique opportunity to probe the non-linear structure of post-Newtonian theory both in the context of general relativity and its alternatives.
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