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dc.contributorEscuela de Ingenierias Industrial, Informática y Aeroespaciales_ES
dc.contributor.authorBettoni, Dario 
dc.contributor.authorEzquiaga, Jose María
dc.contributor.authorHinterbichler, Kurt
dc.contributor.authorZumalacárregui, Miguel
dc.contributor.otherDidactica de la Matematicaes_ES
dc.date2017-04-14
dc.date.accessioned2024-04-18T07:51:54Z
dc.date.available2024-04-18T07:51:54Z
dc.identifier.citationBettoni, D., Ezquiaga, J. M., Hinterbichler, K., & Zumalacárregui, M. (2017). Speed of Gravitational Waves and the Fate of Scalar-Tensor Gravity. ArXiv. https://doi.org/10.48550/arXiv.1608.01982es_ES
dc.identifier.urihttps://hdl.handle.net/10612/19916
dc.description.abstract[EN] The direct detection of gravitational waves (GWs) is an invaluable new tool to probe gravity and the nature of cosmic acceleration. A large class of scalar-tensor theories predicts that GWs propagate with velocity different than the speed of light, a difference that can be O(1) for many models of dark energy. We determine the conditions behind the anomalous GW speed, namely, that the scalar field spontaneously breaks Lorentz invariance and couples to the metric perturbations via the Weyl tensor. If these conditions are realized in nature, the delay between GW and electromagnetic signals from distant events will run beyond human time scales, making it impossible to measure the speed of GWs using neutron star mergers or other violent events. We present a robust strategy to exclude or confirm an anomalous speed of GWs using eclipsing binary systems, the electromagnetic phase of which can be exquisitely determined. The white dwarf binary J0651+2844 is a known example of such a system that can be used to probe deviations in the GW speed as small as cg/c-1≳2×10-12 when LISA comes online. This test will either eliminate many contender models for cosmic acceleration or wreck a fundamental pillar of general relativity.es_ES
dc.languageenges_ES
dc.subjectFísicaes_ES
dc.subject.otherGravitational waves (GW)es_ES
dc.subject.otherGravityes_ES
dc.subject.otherCosmic accelerationes_ES
dc.subject.otherGW speedes_ES
dc.titleSpeed of Gravitational Waves and the Fate of Scalar-Tensor Gravityes_ES
dc.typeinfo:eu-repo/semantics/preprintes_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.subject.unesco2212.05 Gravitaciónes_ES


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