Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Helen Asuküla
  • Manuel Hohmann
  • Vasiliki Karanasou
  • Sebastian Bahamonde
  • Christian Pfeifer
  • João Luís Rosa

Externe Organisationen

  • University of Tartu
  • University of Tokyo (UTokyo)
  • University of Gdansk
  • Zentrum für angewandte Raumfahrt­technologie und Mikro­gravitation (ZARM)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer064027
FachzeitschriftPhysical Review D
Jahrgang109
Ausgabenummer6
PublikationsstatusVeröffentlicht - 11 März 2024
Extern publiziertJa

Abstract

In this work, we study spherically symmetric vacuum solutions in one-parameter new general relativity (NGR), a specific theory in teleparallel gravity which is constructed from the three possible quadratic scalars obtained from torsion with arbitrary coefficients satisfying the requirements for the absence of ghosts. In this class of modified theories of gravity, the observable effects of gravity result from the torsion rather than the curvature of the spacetime. Unlike in GR, where the fundamental quantity is the metric from which the Levi-Civita connection is derived, in teleparallel theories of gravity the fundamental variable is the tetrad, from which one constructs the metric and the teleparallel connection. We consider the most general tetrad for spherical symmetry and we derive the corresponding field equations. Under adequate assumptions, we find three different branches of vacuum solutions and discuss their associated phenomenology. In particular, we analyze the photon sphere, the classical tests of GR such as the light deflection, the Shapiro delay, and the perihelion shift, and also the Komar mass, while providing a detailed comparison with their Schwarzschild spacetime counterparts. Finally, we analyze how the observational imprints from accretion disks and shadows are affected in comparison with their GR counterparts, and conclude that the free parameters of the model might induce additional attractive or repulsive effects to the propagation of photons, depending on their values.

ASJC Scopus Sachgebiete

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Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology. / Asuküla, Helen; Hohmann, Manuel; Karanasou, Vasiliki et al.
in: Physical Review D, Jahrgang 109, Nr. 6, 064027, 11.03.2024.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Asuküla, H, Hohmann, M, Karanasou, V, Bahamonde, S, Pfeifer, C & Rosa, JL 2024, 'Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology', Physical Review D, Jg. 109, Nr. 6, 064027. https://doi.org/10.1103/PhysRevD.109.064027
Asuküla, H., Hohmann, M., Karanasou, V., Bahamonde, S., Pfeifer, C., & Rosa, J. L. (2024). Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology. Physical Review D, 109(6), Artikel 064027. https://doi.org/10.1103/PhysRevD.109.064027
Asuküla H, Hohmann M, Karanasou V, Bahamonde S, Pfeifer C, Rosa JL. Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology. Physical Review D. 2024 Mär 11;109(6):064027. doi: 10.1103/PhysRevD.109.064027
Asuküla, Helen ; Hohmann, Manuel ; Karanasou, Vasiliki et al. / Spherically symmetric vacuum solutions in one-parameter new general relativity and their phenomenology. in: Physical Review D. 2024 ; Jahrgang 109, Nr. 6.
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