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Communication Dans Un Congrès Année : 2022

Compact objects in gravity theories

Résumé

We briefly discuss explicit compact object solutions in higher-order scalar-tensor theories. We start by so-called stealth solutions, whose metric are General Relativity (GR) solutions, but accompanied by a non-trivial scalar field, in both spherically-symmetric and rotating cases. The latter then enables to construct an analytic stationary solution of scalar tensor theory which is called disformed Kerr metric. This solution constitutes a measurable departure from the usual Kerr geometry of GR. We finally consider a scalar-tensor theory stemming from a Kaluza-Klein reduction of a higher-dimensional Lovelock theory, and which enables to obtain non-stealth black holes, highly compact neutron stars and finally wormhole solutions.

Dates et versions

hal-03797132 , version 1 (04-10-2022)

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Athanasios Bakopoulos, Christos Charmousis, Nicolas Lecoeur. Compact objects in gravity theories. 33rd Rencontres de Blois, May 2022, Blois, France. ⟨hal-03797132⟩
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