Absorption by stringy black holes

Abstract

We investigate the absorption of planar massless scalar waves by a charged rotating stringy black hole, namely a Kerr--Sen black hole. We compute numerically the absorption cross section and compare our results with those of the Kerr-Newman black hole, a classical general relativity solution. In order to better compare both charged black holes, we define the ratio of the black hole charge to the extreme charge as $Q$. We conclude that Kerr--Sen and Kerr-Newman black holes have a similar absorption cross section, with the difference increasing for higher values of $Q$.

arXiv comment9 pages, 8 figures

References in corpus (31)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• The Confrontation between General Relativity and Experiment
• A New Era in the Quest for Dark Matter
• Rotating Charged Black Hole Solution in Heterotic String Theory
• A new method for shadow calculations: application to parameterised axisymmetric black holes
• Mergers of Charged Black Holes: Gravitational Wave Events, Short Gamma-Ray Bursts, and Fast Radio Bursts
• Hidden symmetries, null geodesics, and photon capture in the Sen black hole
• Universality of high-energy absorption cross sections for black holes
• Scattering and absorption of gravitational plane waves by rotating black holes
• Black holes and gravitational waves in models of minicharged dark matter
• Destroying Kerr-Sen black holes
• Axisymmetric black holes allowing for separation of variables in the Klein-Gordon and Hamilton-Jacobi equation
• Superradiance in static black hole spacetimes
• Cosmic Censorship Conjecture in Kerr-Sen Black Hole
• Absorption of planar massless scalar waves by Kerr black holes
• Shadows of charged rotating black holes: Kerr-Newman versus Kerr-Sen
• Low-frequency scalar absorption cross sections for stationary black holes
• Scattering from charged black holes and supergravity
• 100 years of the first experimental test of General Relativity
• Stationary Charged Scalar Clouds around Black Holes in String Theory
• Inferring black hole charge from backscattered electromagnetic radiation
• The QCD Axion and Gravitational Waves in light of NANOGrav results
• Scalar absorption: Black holes versus wormholes
• Scalar absorption by charged rotating black holes
• Over-spinning Kerr-Sen black holes with test fields
• Violations of the Kerr and Reissner-Nordstrom bounds: horizon versus asymptotic quantities
• Massive vector fields in Kerr--Newman and Kerr--Sen black hole spacetimes
• On-Axis scalar absorption cross section of Kerr-Newman black holes: Geodesic analysis, sinc and low-frequency approximations
• Merger estimates for Kerr-Sen black holes
• The first attempts to measure light deflection by the Sun
• Analytical Study of a Kerr-Sen Black Hole and a Charged Massive Scalar Field

Cited by in corpus (4)

• Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes
• Testing dynamical torsion effects on the charged black hole's shadow, deflection angle and greybody with M87* and Sgr. A* from EHT
• Scattering by stringy black holes
• Sufficient conditions for unbounded superradiance in black hole spacetimes sourced by nonlinear electrodynamics