http://arxiv.org/abs/1907.02047
We discuss a modified gravity model which fits cosmological observations at a level statistically indistinguishable from $\Lambda$CDM and at the same time predicts very large deviations from General Relativity (GR) in the propagation of gravitational waves (GWs) across cosmological distances. The model is a variant of the RT nonlocal model proposed and developed by our group, with initial conditions set during inflation, and predicts a GW luminosity distance that, at the redshifts accessible to LISA or at a third-generation GW detectors such as the Einstein Telescope (ET), can differ from that in GR by as much as $60\%$. An effect of this size could be detected with just a single standard siren with counterpart by LISA or ET. At the redshifts accessible to the LIGO/Virgo/Kagra network the effect is smaller but still potentially detectable.
E. Belgacem, Y. Dirian, A. Finke, et. al.
Thu, 4 Jul 19
31/46
Comments: 6 pages, 3 figures
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