Results 21 to 30 of about 812,429 (344)
Journal of High Energy Physics, 2020 Abstract We prove that a generalized Schwarzschild-like ansatz can be consistently employed to construct d-dimensional static vacuum black hole solutions in any metric theory of gravity for which the Lagrangian is a scalar invariant constructed from the Riemann tensor and its covariant derivatives of arbitrary order.
Hervik, S., Ortaggio, M. (Marcello)
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European Physical Journal C: Particles and Fields, 2022 We study gravitational lensing in strong-field limit by a static spherically symmetric black hole in quartic scalar field Horndeski gravity having additional hair parameter q, evading the no-hair theorem.
Jitendra Kumar +2 more
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The Role of Primordial Kicks on Black Hole Merger Rates [PDF]
, 2005 Primordial stars are likely to be very massive $\geq30\Msun$, form in isolation, and will likely leave black holes as remnants in the centers of their host dark matter halos in the mass range $10^{6}-10^{10}\Ms$. Such early black holes, at redshifts z$\
Abel, Tom +2 more
core +5 more sources
Physical Review Letters, 2017 We show that the interaction between spin-polarized current and magnetization dynamics can be used to implement black-hole and white-hole horizons for magnons - the quanta of oscillations in the magnetization direction in magnets. We consider three different systems: easy-plane ferromagnetic metals, isotropic antiferromagnetic metals, and easy-plane ...
Alvaro S. Nunez +3 more
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The European Physical Journal C, 2017 We consider the Schwarzschild black hole and show how, in a theory with limiting curvature, the physical singularity "inside it" is removed. The resulting spacetime is geodesically complete. The internal structure of this nonsingular black hole is analogus to Russian nesting dolls.
Viatcheslav Mukhanov +2 more
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Spontaneously vectorized Einstein-Gauss-Bonnet black holes
Physics Letters B, 2021 We construct spontaneously vectorized black holes where a real vector field is coupled to the Gauss-Bonnet invariant. We employ three coupling functions for the vector field, and determine the respective domains of existence of the vectorized black holes.
Simon Barton +3 more
doaj
Thermodynamic and classical instability of AdS black holes in fourth-order gravity [PDF]
, 2014 We study thermodynamic and classical instability of AdS black holes in fourth-order gravity. These include the BTZ black hole in new massive gravity, Schwarzschild-AdS black hole, and higher-dimensional AdS black holes in fourth-order gravity.
Moon, Taeyoon, Myung, Yun Soo
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Quantum black holes. Black hole temperature without a black hole? [PDF]
Proceedings of Black Holes in General Relativity and String Theory — PoS(BHs, GR and Strings), 2009 revtex4, 7 pages, Talk given at Workshop "Black Holes in General Relativity and String Theory", August, 24-30, 2008, Veli Losinj ...
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Accreting fluids onto regular black holes via Hamiltonian approach
European Physical Journal C: Particles and Fields, 2017 We investigate the accretion of test fluids onto regular black holes such as Kehagias–Sfetsos black holes and regular black holes with Dagum distribution function. We analyze the accretion process when different test fluids are falling onto these regular
Abdul Jawad, M. Umair Shahzad
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Shapes and Positions of Black Hole Shadows in Accretion Disks and Spin Parameters of Black Holes [PDF]
J.Korean Phys.Soc.45:S1808-S1812,2004;
Astrophys.J.611:996-1004,2004, 2004 Can we determine a spin parameter of a black hole by observation of a black hole shadow in an accretion disk? In order to answer this question, we make a qualitative analysis and a quantitative analysis of a shape and a position of a black hole shadow casted by a rotating black hole on an optically thick accretion disk and its dependence on an angular ...
arxiv +1 more source