Casadio–Fabbri–Mazzacurati black strings and braneworld-induced quasars luminosity corrections

Abstract

This paper aims to evince the corrections on the black string warped horizon in the braneworld paradigm, and their drastic physical consequences, as well as to provide subsequent applications in astrophysics. Our analysis concerning black holes on the brane departs from the Schwarzschild case, where the black string is unstable to large-scale perturbation. The cognizable measurability of the black string horizon corrections due to braneworld effects is investigated, as well as their applications in the variation of quasars luminosity. We delve into the case wherein two solutions of Einstein's equations proposed by Casadio, Fabbri, and Mazzacurati, regarding black hole metrics presenting a post-Newtonian parameter measured on the brane. In this scenario, it is possible to analyze purely the braneworld corrected variation in quasars luminosity, by an appropriate choice of the post-Newtonian parameter that precludes Hawking radiation on the brane: the variation in quasars luminosity is uniquely provided by pure braneworld effects, as the Hawking radiation on the brane is suppressed.

Classical tests of general relativity: Brane-world Sun from minimal geometric deformation

“…We found the strongest constraint is given by measurements of the perihelion precession, namely Eq. (26).…”

Black hole acoustics in the minimal geometric deformation of a de Laval nozzle

“…Black string and black brane solutions in a variable brane-world context were studied in Refs. [16,35,36].…”

Strong deflection limit lensing effects in the minimal geometric deformation and Casadio–Fabbri–Mazzacurati solutions

“…A detailed study on the causal structure and the 5D black strings associated to both CFM solutions can be found in Refs. [3,21,22]. The modified version of the CFM solutions in the SDL regime appeared previously, in a different context, in Ref.…”