Oblique magnetic fields and the role of frame dragging
Sign Up to like & getrecommendations! Published in 2019 at "Astronomische Nachrichten"
DOI: 10.1002/asna.201913569
Abstract: Magnetic null points can develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The electric component does not vanish in the magnetic… read more here.
Keywords: frame dragging; rotating black; field; black hole ... See more keywords
Exact greybody factors for the brane scalar field of five-dimensional rotating black holes
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep06(2019)041
Abstract: A bstractWe study scalar perturbations of the five-dimensional rotating black holes and find an exact solution giving exact description of the Hawking radiation. Mathematically, the full solution for this spin-zero field is expressed in terms… read more here.
Keywords: greybody factors; greybody; black holes; rotating black ... See more keywords
Observational signatures from horizonless black shells imitating rotating black holes
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2018)070
Abstract: A bstractIn arXiv:1705.10172 it was proposed that string theory replaces Schwarzschild black holes with horizonless thin shells with an AdS interior. In this paper we extend the analysis to slowly rotating black holes, solving the… read more here.
Keywords: signatures horizonless; black holes; rotating black; black hole ... See more keywords
Effective Field Theory for the perturbations of a slowly rotating black hole
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2021)183
Abstract: Abstract We develop the effective theory for perturbations around black holes with scalar hair, in two directions. First, we show that the scalar-Gauss-Bonnet theory, often used as an example exhibiting scalar black hole hair, can… read more here.
Keywords: effective theory; black hole; slowly rotating; rotating black ... See more keywords
Gravitational shockwaves on rotating black holes
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2512-7
Abstract: We present an exact solution of Einstein’s equation that describes the gravitational shockwave of a massless particle on the horizon of a Kerr–Newman black hole. The backreacted metric is of the generalized Kerr–Schild form and… read more here.
Keywords: gravitational shockwaves; shockwaves rotating; black holes; rotating black ... See more keywords
Circular motion and energy extraction in a rotating black hole
Sign Up to like & getrecommendations! Published in 2019 at "Physics of the Dark Universe"
DOI: 10.1016/j.dark.2019.100263
Abstract: This paper explores the circular geodesics of neutral test particles on an equatorial plane around a rotating black hole. After using equations of motion of scalar-tensor-vector gravity with the circular geodesics of null-like particles, we… read more here.
Keywords: energy extraction; black hole; rotating black; energy ... See more keywords
Fluid analogs for rotating black holes
Sign Up to like & getrecommendations! Published in 2018 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aad0fe
Abstract: Fluid analog models for gravity are based on the idea that any spacetime geometry admits a reinterpretation in which space is thought of as a fluid flowing with a prescribed velocity. This fluid picture is… read more here.
Keywords: analogs rotating; black holes; rotating black; fluid ... See more keywords
Rotating black holes in Einstein-aether theory
Sign Up to like & getrecommendations! Published in 2022 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac5053
Abstract: We introduce new methods to numerically construct for the first time stationary axisymmetric black hole solutions in Einstein-aether theory and study their properties. The key technical challenge is to impose regularity at the spin-2, 1,… read more here.
Keywords: aether theory; region; black holes; holes einstein ... See more keywords
Effect of turbulent pressure on the origin of low-frequency quasi-periodic oscillations in rotating black holes
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3543
Abstract: Quasi-periodic oscillation (QPO), particularly of low frequency (LF), is a very obvious feature of outbursting black hole candidates. The association of QPOs in a specific spectral state and their transition with states make them a… read more here.
Keywords: black holes; rotating black; frequency; turbulent pressure ... See more keywords
New rotating black holes in nonlinear Maxwell f(R) gravity
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.124072
Abstract: We investigate static and rotating charged spherically symmetric solutions in the framework of $f({\cal R})$ gravity, allowing additionally the electromagnetic sector to depart from linearity. Applying a convenient, dual description for the electromagnetic Lagrangian, and… read more here.
Keywords: maxwell gravity; holes nonlinear; black holes; rotating black ... See more keywords
Charged rotating black holes in Einstein-Maxwell-Chern-Simons theory with a negative cosmological constant
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.064018
Abstract: We consider rotating black hole solutions in five-dimensional Einstein-Maxwell-Chern-Simons theory with a negative cosmological constant and a generic value of the Chern-Simons coupling constant.. Using both analytical and numerical techniques, we focus on cohomogeneity-1 configurations,… read more here.
Keywords: einstein maxwell; black holes; chern simons; rotating black ... See more keywords