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.
© M. Vallisneri 2012 — last modified on 2010/01/29
Tantum in modicis, quantum in maximis