Gravity Gets There First with Dark Matter Emulators

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dc.creatorDesai, S.
dc.creatorKahya, E. O.
dc.creatorWoodard, R. P.
dc.date2008-04-23
dc.date2008-05-30
dc.date.accessioned2026-07-07T11:33:41Z
dc.date.available2026-07-07T11:33:41Z
dc.descriptionWe discuss the implications for gravity wave detectors of a class of modified gravity theories which dispense with the need for dark matter. These models, which are known as Dark Matter Emulators, have the property that weak gravitational waves couple to the metric that would follow from general relativity without dark matter whereas ordinary particles couple to a combination of the metric and other fields which reproduces the result of general relativity with dark matter. We show that there is an appreciable difference in the Shapiro delays of gravitational waves and photons or neutrinos from the same source, with the gravity waves always arriving first. We compute the expected time lags for GRB 070201, for SN 1987a, and for Sco-X1. We estimate the probable error by taking account of the uncertainty in position, and by using three different dark matter profiles.
dc.description9 pages, no figures. Changes in response to referee comments. To be published in Phys. Rev. D. under the title "Reduced time delay for gravitational waves with dark matter emulators"
dc.identifierhttps://arxiv.org/abs/0804.3804
dc.identifierhttp://arxiv.org/abs/0804.3804
dc.identifierPhys.Rev.D77:124041,2008
dc.identifierdoi:10.1103/PhysRevD.77.124041
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197979
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleGravity Gets There First with Dark Matter Emulators
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