Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Viganò, Adriano"'
In this paper, we construct exact rotating wormholes using Ehlers solution-generating technique. This is based on the Ernst description of four-dimensional, stationary, and axially symmetric solutions of the Einstein-Maxwell theory. We adopt the stat
Externí odkaz:
http://arxiv.org/abs/2306.14541
Autor:
Viganò, Adriano
Multi-black hole solutions play a relevant role both from the theoretical and the phenomenological point of view. In this Thesis, we construct some regular multi-black hole spacetimes in pure Einstein's General Relativity with the aid of solution gen
Externí odkaz:
http://arxiv.org/abs/2211.00436
Publikováno v:
Phys. Rev. D 106, 064014 (2022)
We present a new solution in Einstein's General Relativity representing a Schwarzschild black hole immersed in a rotating universe. Such a solution is constructed analytically by means of the last unexplored Lie point symmetry of the Ernst equations
Externí odkaz:
http://arxiv.org/abs/2205.13548
Publikováno v:
JHEP07(2022)007
We argue that expanding bubbles of nothing are a widespread feature of systems of black holes with multiple or non-spherical horizons, appearing as a limit of regions that are narrowly enclosed by the horizons. The bubble is a minimal cycle that link
Externí odkaz:
http://arxiv.org/abs/2204.09690
Publikováno v:
Phys. Rev. D 106, 024038 (2022)
We present a new family of exact four-dimensional Taub-NUT spacetimes in Einstein-$\Lambda$ theory supplemented with a conformally coupled scalar field exhibiting a power-counting super-renormalizable potential. The construction proceeds as follows:
Externí odkaz:
http://arxiv.org/abs/2202.06706
Autor:
Astorino, Marco, Viganò, Adriano
Publikováno v:
Eur.Phys.J.C 81 (2021) 10, 891
An analytical metric of four-dimensional General Relativity, representing an array of collinear and accelerating black holes, is constructed with the inverse scattering method. The solution can be completely regularised from any conical singularity,
Externí odkaz:
http://arxiv.org/abs/2106.02058
Autor:
Astorino, Marco, Viganò, Adriano
Publikováno v:
Eur.Phys.J.C 82 (2022) 9, 829
We construct analytical and regular solutions in four-dimensional General Relativity which represent multi-black hole systems immersed in external gravitational field configurations. The external field background is composed by an infinite multipolar
Externí odkaz:
http://arxiv.org/abs/2105.02894
We use the recipe of arXiv:1003.2974 to find half-BPS near-horizon geometries in the t$^3$ model of $N=2$, $D=4$ gauged supergravity, and explicitely construct some new examples. Among these are black holes with noncompact horizons, but also with sph
Externí odkaz:
http://arxiv.org/abs/2105.02902
Autor:
Astorino, Marco, Viganò, Adriano
Publikováno v:
Phys.Lett.B 820 (2021) 136506
An exact and analytical solution of four dimensional vacuum General Relativity representing a system of two static black holes at equilibrium is presented. The metric is completely regular outside the event horizons, both from curvature and conical s
Externí odkaz:
http://arxiv.org/abs/2104.07686
In the framework of a mesoscopical model for dielectric media we provide an analytical description for the electromagnetic field confined in a cylindrical cavity containing a finite dielectric sample. This system is apted to simulate the electromagne
Externí odkaz:
http://arxiv.org/abs/2012.05203