Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity

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Authors

  • Sebastian Bahamonde
  • Daniela D. Doneva
  • Ludovic Ducobu
  • Christian Pfeifer
  • Stoytcho S. Yazadjiev

External Research Organisations

  • Center of Applied Space Technology and Microgravity (ZARM)
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Details

Original languageEnglish
Article number104013
JournalPhysical Review D
Volume107
Issue number10
Publication statusPublished - 8 May 2023
Externally publishedYes

Abstract

In this paper, we find new scalarized black holes by coupling a scalar field with the Gauss-Bonnet invariant in teleparallel gravity. The teleparallel formulation of this theory uses torsion instead of curvature to describe the gravitational interaction, and it turns out that, in this language, the usual Gauss-Bonnet term in four dimensions decays in two distinct boundary terms, the teleparallel Gauss-Bonnet invariants. Both can be coupled individually or in any combination to a scalar field, to obtain a teleparallel Gauss-Bonnet extension of the teleparallel equivalent of general relativity. The theory we study contains the familiar Riemannian Einstein-Gauss-Bonnet gravity theory as a particular limit and offers a natural extension, in which scalarization is triggered by torsion and with new interesting phenomenology. We demonstrate numerically the existence of asymptotically flat scalarized black hole solutions and show that, depending on the choice of coupling of the boundary terms, they can have a distinct behavior compared to the ones known from the usual Einstein-Gauss-Bonnet case. More specifically, nonmonotonicity of the metric functions and the scalar field can be present, a feature that was not observed until now for static scalarized black hole solutions.

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Cite this

Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity. / Bahamonde, Sebastian; Doneva, Daniela D.; Ducobu, Ludovic et al.
In: Physical Review D, Vol. 107, No. 10, 104013, 08.05.2023.

Research output: Contribution to journalArticleResearchpeer review

Bahamonde, S, Doneva, DD, Ducobu, L, Pfeifer, C & Yazadjiev, SS 2023, 'Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity', Physical Review D, vol. 107, no. 10, 104013. https://doi.org/10.1103/PhysRevD.107.104013
Bahamonde, S., Doneva, D. D., Ducobu, L., Pfeifer, C., & Yazadjiev, S. S. (2023). Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity. Physical Review D, 107(10), Article 104013. https://doi.org/10.1103/PhysRevD.107.104013
Bahamonde S, Doneva DD, Ducobu L, Pfeifer C, Yazadjiev SS. Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity. Physical Review D. 2023 May 8;107(10):104013. doi: 10.1103/PhysRevD.107.104013
Bahamonde, Sebastian ; Doneva, Daniela D. ; Ducobu, Ludovic et al. / Spontaneous scalarization of black holes in Gauss-Bonnet teleparallel gravity. In: Physical Review D. 2023 ; Vol. 107, No. 10.
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