Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Betti, P."'
Autor:
Brihaye, Yves, Hartmann, Betti
We discuss the formation of scalar clouds on charged, spherically symmetric and static stars and black holes. We first discuss Reissner-Nordstr\"om black holes with electric and magnetic charge and present new results demonstrating the existence of a
Externí odkaz:
http://arxiv.org/abs/2407.16441
Autor:
Brihaye, Yves, Hartmann, Betti
We study the transition of charged boson stars from sub- to super-criticality. This transition is defined as that choice of coupling constants for which the Coulomb repulsion of two individual bosons (that make up the star) exactly cancels their grav
Externí odkaz:
http://arxiv.org/abs/2307.13071
Autor:
Brihaye, Yves, Hartmann, Betti
In this paper, we follow up on the discovery of a new type of solution in the Einstein-Maxwell system coupled minimally to a self-interacting complex scalar field. For sufficiently large gravitational coupling and sufficiently small electromagnetic c
Externí odkaz:
http://arxiv.org/abs/2112.12830
We study holographic phase transitions in (2+1) dimensions that possess interacting phases which result from a direct coupling between the two U(1) gauge fields. This can be interpreted as a non-minimal interaction between the electric and spin motiv
Externí odkaz:
http://arxiv.org/abs/2112.06094
Publikováno v:
Phys. Rev. D 103, 124020 (2021)
In this paper, we study the spontaneous scalarization of an extended, self-gravitating system which is static, cylindrically symmetric and possesses electromagnetic fields. We demonstrate that a real massive scalar field condenses on this Melvin magn
Externí odkaz:
http://arxiv.org/abs/2103.09307
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 h
Externí odkaz:
http://arxiv.org/abs/2103.01651
Autor:
Brihaye, Yves, Hartmann, Betti
In this paper, we re-examine charged Q-clouds around spherically symmetric, static black holes. In particular, we demonstrate that for fixed coupling constants two different branches of charged scalar clouds exist around Schwarzschild black holes. Th
Externí odkaz:
http://arxiv.org/abs/2009.08293
Publikováno v:
Phys. Rev. D 101, 124016 (2020)
We study the spontaneous scalarization of spherically symmetric, static and asymptotically Anti-de Sitter (aAdS) black holes in a scalar-tensor gravity model with non-mininal coupling of the form $\phi^2\left(\alpha{\cal R} + \gamma {\cal G}\right)$,
Externí odkaz:
http://arxiv.org/abs/1911.01950
Publikováno v:
Phys. Rev. D 101, 076004 (2020)
In this paper we demonstrate that solitons of a simple real scalar field model that are {\it static and linearly stable} do exist when considered in a (3+1)-dimensional, spatially compact space-time background, the static Einstein universe, which is
Externí odkaz:
http://arxiv.org/abs/1908.09684
Autor:
Brihaye, Yves, Hartmann, Betti
We study the spontaneous scalarization of spherically symmetric, asymptotically flat boson stars in the $(\alpha {\cal R} + \gamma {\cal G}) \phi^2$ scalar-tensor gravity model. These compact objects are made of a complex valued scalar field that has
Externí odkaz:
http://arxiv.org/abs/1903.10471