Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Natario, Jose"'
Autor:
Cardoso, Vitor, Natário, José
The Schwarzschild-Melvin spacetime is an exact solution of the Einstein electrovacuum equations describing a black hole immersed in a magnetic field which is asymptotically aligned with the z-axis. It plays an important role in our understanding of t
Externí odkaz:
http://arxiv.org/abs/2410.02851
We study electromagnetic radiation reaction on a charged particle around a weakly magnetized Kerr black hole. We solve numerically the Teukolsky equation to find energy fluxes in electromagnetic radiation at the horizon and at spatial infinity. We al
Externí odkaz:
http://arxiv.org/abs/2409.17225
We derive the equations of motion for relativistic elastic membranes, that is, two-dimensional elastic bodies whose internal energy depends only on their stretching, starting from a variational principle. We show how to obtain conserved quantities fo
Externí odkaz:
http://arxiv.org/abs/2409.10602
Linearised relativistic elasticity equations of motion are considered for a rod and a spinning ring encountering a gravitational wave. In the case of the rod, the equations reduce to a wave equation with appropriate boundary conditions. Using Fourier
Externí odkaz:
http://arxiv.org/abs/2407.07547
Publikováno v:
Class. Quantum Grav. 41 (2024) 215002
We study the motion of an elastic rigid rod which is radially free-falling towards a Schwarzschild black hole. This is accomplished by reducing the corresponding free-boundary PDE problem to a sequence of ODEs, which we integrate numerically. Startin
Externí odkaz:
http://arxiv.org/abs/2404.08732
We study radiation from charged particles in circular motion around a Schwarzschild black hole immersed in an asymptotically uniform magnetic field. In curved space, the radiation reaction force is described by the DeWitt-Brehme equation, which inclu
Externí odkaz:
http://arxiv.org/abs/2404.02195
Publikováno v:
EPL 146 (2024) 19002
It has been claimed in I. Arraut, 2023 EPL 144 29003 [arXiv:2311.05652] that General Relativity can generate effects equivalent to dark matter, based on a "new modified symmetry that emerges at galactic scale". We show that (i) the spacetime consider
Externí odkaz:
http://arxiv.org/abs/2402.00081
Autor:
Costa, L. Filipe O., Natário, José
Publikováno v:
Phys. Rev. D 110, 064056 (2024)
It has been suggested in recent literature that nonlinear and/or gravitomagnetic general relativistic effects can play a leading role in galactic dynamics, partially or totally replacing dark matter. Using the 1+3 "quasi-Maxwell" formalism, we show,
Externí odkaz:
http://arxiv.org/abs/2312.12302
Publikováno v:
Class.Quant.Grav. 41 (2024) 7, 073002
The purpose of this review it to present a renewed perspective of the problem of self-gravitating elastic bodies under spherical symmetry. It is also a companion to the papers [Phys. Rev. D105, 044025 (2022)], [Phys. Rev. D106, L041502 (2022)], and [
Externí odkaz:
http://arxiv.org/abs/2307.03146
Publikováno v:
Phys.Rev.D 109 (2024) 6, 064037
We present a model of relativistic elastic stars featuring scale invariance. This implies a linear mass-radius relation and the absence of a maximum mass. The most compact spherically symmetric configuration that is radially stable and satisfies all
Externí odkaz:
http://arxiv.org/abs/2306.16584