Distinguishing general relativity from Chern-Simons gravity using gravitational wave polarizations
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.
Cite
@article{arxiv.1812.00187,
title = {Distinguishing general relativity from Chern-Simons gravity using gravitational wave polarizations},
author = {Soham Bhattacharyya and S. Shankaranarayanan},
journal= {arXiv preprint arXiv:1812.00187},
year = {2019}
}
Comments
17 pages, version as accepted in Physical Review D