Probing Gravity with Spacetime Sirens
- 4 October 2007
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 668 (2), L143-L146
- https://doi.org/10.1086/522931
Abstract
11 pages, 1 figureA 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 scalesKeywords
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