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Probing Gravity with Spacetime Sirens

C. Deffayet 1 K. Menou
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : A gravitational observatory such as LISA will detect coalescing pairs of massive black holes, accurately measure their luminosity distance and help identify a host galaxy or an electromagnetic counterpart. If dark energy is a manifestation of modified gravity on large scales, gravitational waves from cosmologically-distant spacetime sirens are direct probes of this new physics. For example, a gravitational Hubble diagram based on black hole pair luminosity distances and host galaxy redshifts could reveal a large distance extra-dimensional leakage of gravity. Various additional signatures may be expected in a gravitational signal propagated over cosmological scales.
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Contributor : Simone Lantz <>
Submitted on : Monday, September 17, 2007 - 3:08:23 PM
Last modification on : Sunday, January 3, 2021 - 11:26:03 AM

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C. Deffayet, K. Menou. Probing Gravity with Spacetime Sirens. The Astrophysical journal letters, Bristol : IOP Publishing, 2007, 668, pp.L143-L146. ⟨10.1086/522931⟩. ⟨in2p3-00172577⟩



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