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.

6 pages, 4 figures; IMR consistency test updates and additional citations; Updated DECIGO noise curves; Small fixes and style change; Fixed small issue with Lisa/TianQin bounds on beta