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arXiv · 1812.00187

Distinguishing general relativity from Chern-Simons gravity using gravitational wave polarizations

Soham Bhattacharyya·S. Shankaranarayanan
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Abstract

Quasi-normal modes (QNMs) uniquely characterize the final black-hole. Till now, only the QNM frequency and damping time are used to test General relativity. In this work, we show explicitly that another property of the QNMs --- their polarization --- can be a reliable tool for probing gravity. We provide a consistent test for General relativity by considering Chern-Simons gravity. Distinguishing Chern-Simons gravity from General relativity using only template matching is highly challenging. Thus a parameter that can differentiate between Chern-Simons gravity and GR will be a suitable candidate for any modified theories of gravity. We discuss the implications of our result for the future gravitational wave detectors.

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Soham Bhattacharyya, S. Shankaranarayanan. 2019-06-19. Distinguishing general relativity from Chern-Simons gravity using gravitational wave polarizations. https://doi.org/10.1103/physrevd.100.024022

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