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Communication Dans Un Congrès Année : 2017

Limits on the anomalous speed of gravitational waves from binary pulsars

Résumé

A large class of modified theories of gravity used as models for dark energy predict a propagation speed for gravitational waves which can differ from the speed of light. This difference of propagations speeds for photons and gravitons has an impact in the emission of gravitational waves by binary systems. Thus, we revisit the usual quadrupolar emission of binary system for an arbitrary propagation speed of gravitational waves and obtain the corresponding period decay formula. We then use timing data from the Hulse-Taylor binary pulsar and obtain that the speed of gravitational waves can only differ from the speed of light at the percentage level. This bound places tight constraints on dark energy models featuring an anomalous propagations speed for the gravitational waves.

Dates et versions

hal-01584602 , version 1 (09-09-2017)

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Hermano Velten, Jose Beltrán Jiménez, Federico Piazza. Limits on the anomalous speed of gravitational waves from binary pulsars. 7th International Workshop on Astronomy and Relativistic Astrophysics, Oct 2016, Gramado, Brazil. pp.1760016, ⟨10.1142/S2010194517600163⟩. ⟨hal-01584602⟩
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