Prospects for gravitationalwave polarization tests from compact binary mergers with future groundbased detectors
Abstract
There exist six possible polarization modes of gravitational waves in a general metric theory of gravity, while two tensor polarization modes are allowed in general relativity. The properties and number of polarization modes depend on gravity theories. For transient signals, the number of the detectors needs to be basically equal to the number of the gravitationalwave polarization modes for separation of polarizations. However, a single detector having great sensitivity at lower frequency could be effectively regarded as a virtual detector network including a set of detectors along its trajectory due to a long gravitationalwave signal from a compact binary and the Earth's rotation. Thus, timevarying antenna pattern functions can help test the polarizations of gravitational waves. We study the effects of the Earth's rotation on the polarization test and show a possibility to test the nontensorial polarization modes from future observations of compact binary mergers with groundbased gravitational detectors such as Einstein telescope and Cosmic Explorer.
 Publication:

Physical Review D
 Pub Date:
 August 2019
 DOI:
 10.1103/PhysRevD.100.042001
 arXiv:
 arXiv:1904.09989
 Bibcode:
 2019PhRvD.100d2001T
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 12 pages, 4 figures