Probing Gravity with Spacetime Sirens
Astrophysics
2015-06-30 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
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.
Keywords
Cite
@article{arxiv.0709.0003,
title = {Probing Gravity with Spacetime Sirens},
author = {Cedric Deffayet and Kristen Menou},
journal= {arXiv preprint arXiv:0709.0003},
year = {2015}
}
Comments
11 pages, 1 figure, accepted for publication in ApJ Letters