Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials

Hansen, Jakob; Yeom, Dong-han

doi:10.1088/1475-7516/2015/09/019

Cited by 16 publications

(12 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The role of dilatonic and phantom couplings during the collapse within the Einstein-Maxwell theory was elaborated in [12][13][14][15]. The gravitational evolution of scalar fields in the Brans-Dicke theory was inspected in [16][17][18]. The influence of the dark sector, i.e., the presence of dark matter and dark energy in spacetime, on the collapse of an electrically charged scalar field was examined in [19].…”

Section: Introductionmentioning

confidence: 99%

Gravitational dynamics in the toy model of the Higgs-dark matter sector: the field theoretic perspective

Nakonieczna

Nakonieczny

2020

Eur. Phys. J. C

View full text Add to dashboard Cite

The objective of the paper was to examine gravitational evolutions in the Higgs-dark matter sector toy model. The real part of the Higgs doublet was modelled by a neutral scalar. Two dark matter candidates introduced were the dark photon and a charged complex scalar. Non-minimal couplings of both scalars to gravity were included. The coupling channels between the ordinary and dark matter sectors were kinetic mixing between the electromagnetic and dark U(1) fields and the Higgs portal coupling among the scalars. The structures of emerging singular spacetimes were either of Schwarzschild or Reissner–Nordström types. The non-minimal scalar–gravity couplings led to an appearance of timelike portions of apparent horizons where they transform from spacelike to null. The features of dynamical black holes were described as functions of the model parameters. The black holes formed later and their radii and masses were smaller as the mass parameter of the complex scalar increased. The dependencies on the coupling of the Higgs field to gravity exhibited extrema, which were a maximum for the time of the black holes formation and minima in the cases of their radii and masses. A set of quantities associated with an observer moving with the evolving matter was proposed. The energy density, radial pressure and pressure anisotropy within dynamical spacetimes get bigger as the singularity is approached. The increase is more considerable in the Reissner–Nordström spacetimes. The apparent horizon local temperature changes monotonically in the minimally coupled case and non-monotonically when non-minimal scalar–gravity couplings are involved.

show abstract

Section: Introductionmentioning

confidence: 99%

Gravitational dynamics in the toy model of the Higgs-dark matter sector: the field theoretic perspective

Nakonieczna

Nakonieczny

2020

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…The effect of pair creation during the collapse and the subsequent evaporation of a black hole were also considered [3,4,8,9]. The collapse of a Brans-Dicke field was elaborated in [10][11][12][13], while the results of the gravitational evolution in Einstein-Maxwell-dilaton theory with standard and phantom couplings of the involved fields were described in [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Dark sector impact on gravitational collapse of an electrically charged scalar field

Nakonieczna

Rogatko

Nakonieczny

2015

J. High Energ. Phys.

View full text Add to dashboard Cite

Dark matter and dark energy are dominating components of the Universe. Their presence affects the course and results of processes, which are driven by the gravitational interaction. The objective of the paper was to examine the influence of the dark sector on the gravitational collapse of an electrically charged scalar field. A phantom scalar field was used as a model of dark energy in the system. Dark matter was modeled by a complex scalar field with a quartic potential, charged under a U(1)-gauge field. The dark components were coupled to the electrically charged scalar field via the exponential coupling and the gauge field-Maxwell field kinetic mixing, respectively. Complete non-linear simulations of the investigated process were performed. They were conducted from regular initial data to the end state, which was the matter dispersal or a singularity formation in a spacetime. During the collapse in the presence of dark energy dynamical wormholes and naked singularities were formed in emerging spacetimes. The wormhole throats were stabilized by the violation of the null energy condition, which occurred due to a significant increase of a value of the phantom scalar field function in its vicinity. The square of mass parameter of the dark matter scalar field potential controlled the formation of a Cauchy horizon or wormhole throats in the spacetime. The joint impact of dark energy and dark matter on the examined process indicated that the former decides what type of an object forms, while the latter controls the amount of time needed for the object to form. Additionally, the dark sector suppresses the natural tendency of an electrically charged scalar field to form a dynamical Reissner-Nordström spacetime during the gravitational collapse.

show abstract

“…In Refs. [32][33][34][35] we found various string-inspired models that allow various scalar hairs (normal scalar as well as Brans-Dicke scalar). In this case, a hair appears due to a special coupling with the electric charge.…”

Section: Summary and Discussionmentioning

confidence: 99%

Stationary charged scalar clouds around black holes in string theory

Bernard

2016

Phys. Rev. D

View full text Add to dashboard Cite

It was reported that Kerr-Newman black holes can support linear charged scalar fields in their exterior regions. These stationary massive charged scalar fields can form bound states, which are called stationary scalar clouds. In this paper, we show that Kerr-Sen black holes can also support stationary massive charged scalar clouds by matching the nearand far-region solutions of the radial part of the Klein-Gordon wave equation. We also review stationary scalar clouds within the background of static electrically charged black hole solutions in the low-energy limit of heterotic string field theory, namely, the GibbonsMaeda-Garfinkle-Horowitz-Strominger black holes.

show abstract

Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials

Cited by 16 publications

References 63 publications

Gravitational dynamics in the toy model of the Higgs-dark matter sector: the field theoretic perspective

Gravitational dynamics in the toy model of the Higgs-dark matter sector: the field theoretic perspective

Dark sector impact on gravitational collapse of an electrically charged scalar field

Stationary charged scalar clouds around black holes in string theory

Contact Info

Product

Resources

About