Slowly rotating black hole spacetimes in Einstein-Bel-Robinson gravity are constructed to leading order in spin and coupling, and their geodesics, shadows, ISCOs, and massive scalar superradiance are computed, yielding a weak astrophysical constraint on the coupling.
Black hole solutions to Einstein-Bel-Robinson gravity
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abstract
In this paper, we study the physical properties of black holes in the framework of the recently proposed Einstien-Bel-Robinson gravity. We show that interestingly the theory propagates a transverse and massive graviton on a maximally symmetric background with positive energy. There is also a single ghost-free branch that returns to the Einstein case when \beta\to 0. We find new black hole solutions to the equations, both approximate and exact, the latter being a constant curvature black hole solution, and discuss inconsistencies with metrics that were previously claimed to be approximate solutions to the equations. We obtain the conserved charges of the theory and briefly study the thermodynamics of the black hole solutions.
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Slowly rotating black hole solution to Einstein-Bel-Robinson gravity
Slowly rotating black hole spacetimes in Einstein-Bel-Robinson gravity are constructed to leading order in spin and coupling, and their geodesics, shadows, ISCOs, and massive scalar superradiance are computed, yielding a weak astrophysical constraint on the coupling.