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 Shadows in Einstein-Bel-Robinson Gravity
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abstract
Gravity models given by higher-order scalar curvature corrections are believed to bear important consequences. The Einstein-Bel-Robinson gravity, with quartic curvature modification, motivated Sajadi et al to explore static spherically symmetric black hole solutions with perturbative methods. In this paper, inspired by their work, we investigate AdS black hole shadows in EBR gravity. Moreover, we demonstrate how the gravity parameter alters the energy emission rate. Finally, we handle the same problem in the presence of plasma, since the black holes are thought to be surrounded by a medium that changes the geodesic of photons.
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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.