Testing general relativity using golden blackhole binaries
Abstract
The coalescences of stellarmass blackhole binaries through their inspiral, merger, and ringdown are among the most promising sources for groundbased gravitationalwave (GW) detectors. If a GW signal is observed with sufficient signaltonoise ratio, the masses and spins of the black holes can be estimated from just the inspiral part of the signal. Using these estimates of the initial parameters of the binary, the mass and spin of the final black hole can be uniquely predicted making use of generalrelativistic numerical simulations. In addition, the mass and spin of the final black hole can be independently estimated from the mergerringdown part of the signal. If the binary blackhole dynamics is correctly described by general relativity (GR), these independent estimates have to be consistent with each other. We present a Bayesian implementation of such a test of general relativity, which allows us to combine the constraints from multiple observations. Using kludge modified GR waveforms, we demonstrate that this test can detect sufficiently large deviations from GR and outline the expected constraints from upcoming GW observations using the secondgeneration of groundbased GW detectors.
 Publication:

Physical Review D
 Pub Date:
 July 2016
 DOI:
 10.1103/PhysRevD.94.021101
 arXiv:
 arXiv:1602.02453
 Bibcode:
 2016PhRvD..94b1101G
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 5 pages, 2 figs