Multi-band gravitational wave tests of general relativity

Abstract

The violent collisions of black holes provide for excellent test-beds of Einstein's general relativity in the strong/dynamical gravity regime. We here demonstrate the resolving power one can gain upon the use of multi-band observations of gravitational waves from both ground-and space-based detectors. We find significant improvement in both generic parameterized tests of general relativity and consistency tests of inspiral-merger-ringdown parts of the waveform over single-band detections. Such multi-band observations are crucial for unprecedented probes of e.g. parity-violation in gravity.

Scope Out Multiband Gravitational-Wave Observations of GW190521-Like Binary Black Holes with Space Gravitational Wave Antenna B-DECIGO

“…The test (i) is similar to our inspiral-ringdown consistency test directly using the information of the merger phase, and makes the most of the GW waveform. It has been pointed out that the values of this test with GW150914-like BBH systems will be maximized in the multiband observation [28,29,128]. Our result suggests that the same will be true for the GW190521-like "intermediate-mass" BBH systems, too.…”

“…This study was immediately followed up with more detailed analyses. The works include (but not limited to) the improved estimation of source parameters [25,26], tests of GR with high precision [27][28][29][30][31][32], refined event rate estimations [33], probing environment effects [34,35], and new data analysis ideas [36]; these all prove the scientific values added by the multiband observation. Among these investigations, Refs.…”

AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

“…This is similar to the strategy proposed in [53] for the synergistic operation of LISA and LIGO. • As discussed in [55], combined measurements by AEDGE and other detectors would provide unparalleled lever arms for probing fundamental physics by measuring post-Newtonian and post-Minkowskian [56] gravitational parameters, probing Lorentz invariance in GW propagation and the possibility of parity-violating gravity. In summary, the mid-frequency GW detection capabilities of AEDGE discussed here will play a crucial part in characterising the full mass spectrum of black holes and their evolution, thereby casting light on their role in shaping galaxies.…”

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

“…Observe that the resulting areas agree very well with each other, up to ∼ 10%. This indicates that the Fisher analysis IMR consistency tests presented in [87,88] can be trusted to agree somewhat well with their Bayesian counterpart. Here we display the results for LIGO O1 (Fisher [87,88] and Bayesian [16] for comparison), CE, and the multi-band observation of CE and LISA.The areas of such confidence regions are displayed in Table 2, and show the following: (i) good agreement within ∼ 10% between the Fisher and Bayesian analyses, (ii) three orders-of-magnitude improvement from LIGO O1 to CE, and (iii) up to an additional order-of-magnitude improvement with multi-band observations.…”

“…Chamberlain and Yunes [86] considered the theoretical physics implications on various modified theories of gravity from BBH mergers detected by future GW detectors, which nicely complements [58] reviewed in Section 2.2. In [87,88], we similarly presented estimates on future bounds on coupling parameters for various modified theories of gravity. Here, we sum up these results for the future GW detectors Cosmic Explorer [18] (CE), LISA [20], TianQin [22], B-DECIGO [24], and DECIGO [23,61].…”