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Constraint on modified dispersion relations for gravitational waves from gravitational Cherenkov radiation

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arxiv 1509.00610 v2 pith:6OIIEMNG submitted 2015-09-02 gr-qc

classification gr-qc
keywords gravitationalmodifiedcherenkovconstraintradiationwavesdispersiongravity
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We investigate the hypothetical process of gravitational Cherenkov radiation, which may occur in modified gravity theories. We obtain a useful constraint on a modified dispersion relation for propagating modes of gravitational waves, which could be predicted as a consequence of violation of the Lorentz invariance in modified theories of gravity. The constraint from gravitational Cherenkov radiation and that from direct measurements of the gravitational waves emitted by a compact binary system are complementary to each other.

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  1. Better early than never: A new test for superluminal gravitational wave polarizations

    gr-qc 2025-01 conditional novelty 6.0 of 10

    A backward search in time from known gravitational wave detections could detect or constrain superluminal non-tensor polarizations, and the authors argue this is feasible with current detectors.

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