scholarly journals Parameterized and Consistency Tests of Gravity with GravitationalWaves: Current and Future

Proceedings ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 5 ◽  
Author(s):  
Zack Carson ◽  
Kent Yagi
Keyword(s):  
General Relativity ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Dynamical Regime ◽  
Future Prospects ◽  
Tests Of General Relativity ◽  
Open Questions ◽  
Tests Of Gravity ◽  
Multi Band

Gravitational wave observations offer unique opportunities to probe gravity in the strong and dynamical regime, which was difficult to access previously. We here review two theory-agnostic ways to carry out tests of general relativity with gravitational waves, namely (i) parameterized waveform tests and (ii) consistency tests between the inspiral and merger-ringdown portions. For each method, we explain the formalism, followed by results from existing events, and finally we discuss future prospects with upgraded detectors, including the possibility of using multi-band gravitational-wave observations with ground-based and space-borne interferometers. We show that such future observations have the potential to improve upon current bounds on theories beyond general relativity by many orders of magnitude. We conclude by listing several open questions that remain to be addressed.

scholarly journals Strong-lensing of Gravitational Waves by Galaxy Clusters

2017 ◽  
Vol 13 (S338) ◽  
pp. 98-102 ◽  
Author(s):  
Graham P. Smith ◽  
Christopher Berry ◽  
Matteo Bianconi ◽  
Will M. Farr ◽  
Mathilde Jauzac ◽  
...  
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Gravitational Waves ◽  
Galaxy Clusters ◽  
Detection Rate ◽  
Compact Objects ◽  
Future Prospects ◽  
Tests Of General Relativity ◽  
Strong Lensing

AbstractDiscovery of strongly-lensed gravitational wave (GW) sources will unveil binary compact objects at higher redshifts and lower intrinsic luminosities than is possible without lensing. Such systems will yield unprecedented constraints on the mass distribution in galaxy clusters, measurements of the polarization of GWs, tests of General Relativity, and constraints on the Hubble parameter. Excited by these prospects, and intrigued by the presence of so-called “heavy black holes” in the early detections by LIGO-Virgo, we commenced a search for strongly-lensed GWs and possible electromagnetic counterparts in the latter stages of the second LIGO observing run (O2). Here, we summarise our calculation of the detection rate of strongly-lensed GWs, describe our review of BBH detections from O1, outline our observing strategy in O2, summarize our follow-up observations of GW170814, and discuss the future prospects of detection.

scholarly journals Testing General Relativity with Gravitational Waves: An Overview

Universe ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 497
Author(s):  
N. V. Krishnendu ◽  
Frank Ohme
Keyword(s):  
General Relativity ◽  
General Theory ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Strong Field ◽  
Theory Of Relativity ◽  
General Theory Of Relativity ◽  
Tests Of General Relativity ◽  
Compact Binary

The detections of gravitational-wave (GW) signals from compact binary coalescence by ground-based detectors have opened up the era of GW astronomy. These observations provide opportunities to test Einstein’s general theory of relativity at the strong-field regime. Here we give a brief overview of the various GW-based tests of General Relativity (GR) performed by the LIGO-Virgo collaboration on the detected GW events to date. After providing details for the tests performed in four categories, we discuss the prospects for each test in the context of future GW detectors. The four categories of tests include the consistency tests, parametrized tests for GW generation and propagation, tests for the merger remnant properties, and GW polarization tests.

scholarly journals The confrontation between general relativity and experiment

2009 ◽  
Vol 5 (S261) ◽  
pp. 198-199
Author(s):  
Clifford M. Will
Keyword(s):  
General Relativity ◽  
Gravitational Wave ◽  
Equivalence Principle ◽  
Gamma Ray ◽  
Strong Field ◽  
Weak Field ◽  
X Ray ◽  
Spacetime Geometry ◽  
Tests Of General Relativity ◽  
Laser Interferometric

AbstractWe review the experimental evidence for Einstein's general relativity. A variety of high precision null experiments confirm the Einstein Equivalence Principle, which underlies the concept that gravitation is synonymous with spacetime geometry, and must be described by a metric theory. Solar system experiments that test the weak-field, post-Newtonian limit of metric theories strongly favor general relativity. Binary pulsars test gravitational-wave damping and aspects of strong-field general relativity. During the coming decades, tests of general relativity in new regimes may be possible. Laser interferometric gravitational-wave observatories on Earth and in space may provide new tests via precise measurements of the properties of gravitational waves. Future efforts using X-ray, infrared, gamma-ray and gravitational-wave astronomy may one day test general relativity in the strong-field regime near black holes and neutron stars.

scholarly journals Multiparameter Tests of General Relativity Using Multiband Gravitational-Wave Observations

2020 ◽  
Vol 125 (20) ◽  
Author(s):  
Anuradha Gupta ◽  
Sayantani Datta ◽  
Shilpa Kastha ◽  
Ssohrab Borhanian ◽  
K. G. Arun ◽  
...  
Keyword(s):  
General Relativity ◽  
Gravitational Wave ◽  
Tests Of General Relativity

scholarly journals Modifications to Plane Gravitational Waves from Minimal Lorentz Violation

Symmetry ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1318 ◽  
Author(s):  
Rui Xu
Keyword(s):  
General Relativity ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Lorentz Invariance ◽  
Lorentz Violation ◽  
First Order ◽  
Test Particles ◽  
Violation Of Lorentz Invariance ◽  
Plane Gravitational Waves ◽  
Wave Modes

General Relativity predicts two modes for plane gravitational waves. When a tiny violation of Lorentz invariance occurs, the two gravitational wave modes are modified. We use perturbation theory to study the detailed form of the modifications to the two gravitational wave modes from the minimal Lorentz-violation coupling. The perturbation solution for the metric fluctuation up to the first order in Lorentz violation is discussed. Then, we investigate the motions of test particles under the influence of the plane gravitational waves with Lorentz violation. First-order deviations from the usual motions are found.

scholarly journals ELECTROMAGNETIC COUNTERPARTS OF GRAVITATIONAL WAVE SOURCES: MERGERS OF COMPACT OBJECTS

2013 ◽  
Vol 22 (01) ◽  
pp. 1341011 ◽  
Author(s):  
ATISH KAMBLE ◽  
DAVID L. A. KAPLAN
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Compact Objects ◽  
Detection Rates ◽  
Radio Transients ◽  
The Masses ◽  
Multi Band

Mergers of compact objects are considered prime sources of gravitational waves (GW) and will soon be targets of GW observatories such as the Advanced-LIGO and VIRGO. Finding electromagnetic counterparts of these GW sources will be important to understand their nature. We discuss possible electromagnetic signatures of the mergers. We show that the BH–BH mergers could have luminosities which exceed Eddington luminosity from unity to several orders of magnitude depending on the masses of the merging BHs. As a result these mergers could be explosive, release up to 1051 erg of energy and shine as radio transients. At any given time we expect about a few such transients in the sky at GHz frequencies, which could be detected to be about 300 Mpc. It has also been argued that these radio transients would look alike radio supernovae with comparable detection rates. Multi-band follow-up could, however, distinguish between the mergers and supernovae.

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