[0709.0003] Probing Gravity with Spacetime Sirens

Authors: Cedric Deffayet (APC/IAP), Kristen Menou (Columbia)

Date: 31 Aug 2007

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.

abs pdf

Jan 03, 2008

0709.0003 (/preprints)
2008-01-03, 15:36 [edit]

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