Black holes in modified gravity (MOG)
By J. W. Moffat. 2014
222 citations recorded by the source corpus.
The field equations for scalar–tensor–vector gravity (STVG) or modified gravity (MOG) have a static, spherically symmetric black hole solution determined by the mass $$M$$M with two horizons. The strength of the gravitational constant is $$G=G_N(1+\alpha )$$G=GN(1+α) where $$\alpha $$α is a parameter. A regular singularity-free MOG solution is derived using a nonlinear field dynamics for the repulsive gravitational field component and a reasonable physical energy-momentum tensor. The Kruskal–Szekeres completion of the MOG black hole solution is obtained. The Kerr-MOG black hole solution is determined by the mass $$M$$M, the parameter $$\alpha $$α and the spin angular momentum $$J=Ma$$J=Ma. The equations of motion and the stability condition of a test particle orbiting the MOG black hole are derived, and the radius of the black hole photosphere and the shadows cast by the Schwarzschild-MOG and Kerr-MOG black holes are calculated. A traversable wormhole solution is constructed with a throat stabilized by the repulsive component of the gravitational field.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/af8b710c2fcb0f3811585ff43cb4b60303e8eecf
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Citations in the corpus
- Shadow and quasinormal modes of a rotating loop quantum black hole (2020, background): “[20] J.”
- First M87 Event Horizon Telescope Results. V. Physical Origin of the Asymmetric Ring (2019, unknown): “The second category comprises black hole solutions with classical modifications to general relativity, as well as effects coming from approaches to quantum gravity (see, e.g., Moffat 2015; Dastan et al. 2016; Younsi et al. 2016; Amir et al. 2018; Eiroa & Sendra 2018; Giddings & Psaltis 2018).”