Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields

Pulsar-timing has become a celebrated tool for probing modifications to General Relativity in the strong-field surroundings of neutron stars. Here we investigate whether scalar-tensor theories that incorporate a nonminimally coupled scalar degree of freedom may pass pulsar-timing tests, by computing...

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Veröffentlicht in:arXiv.org 2019-06
Hauptverfasser: Mendes, Raissa F P, Ottoni, Tulio
Format: Artikel
Sprache:eng
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Zusammenfassung:Pulsar-timing has become a celebrated tool for probing modifications to General Relativity in the strong-field surroundings of neutron stars. Here we investigate whether scalar-tensor theories that incorporate a nonminimally coupled scalar degree of freedom may pass pulsar-timing tests, by computing the scalar charges entering such observables. In particular we show that for positive values of the nonminimal coupling \(\xi\), pulsar-timing constraints may be evaded even in the presence of spontaneous scalarization.
ISSN:2331-8422
DOI:10.48550/arxiv.1903.11638