Electrically charged compact stars and formation of charged black holes

Ray, Subharthi; Espíndola, Aquino L.; Malheiro, M.; Lemos, José P. S.; Zanchin, Vilson T.

doi:10.1103/physrevd.68.084004

Cited by 256 publications

(263 citation statements)

References 19 publications

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“…The role of charge distribution in the dynamics of such configurations is clearly exhibited in equations (36), (37), (40) and (50). In particular it is worth stressing the fact that electric charge, unlike pressure, does not always produce a "regeneration effect" (does not always increase the "active gravitational mass").…”

Section: Discussionmentioning

confidence: 99%

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Nonadiabatic charged spherical gravitational collapse

et al. 2007

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We present a complete set of the equations and matching conditions required for the description of physically meaningful charged, dissipative, spherically symmetric gravitational collapse with shear. Dissipation is described with both free-streaming and diffusion approximations. The effects of viscosity are also taken into account. The roles of different terms in the dynamical equation are analyzed in detail. The dynamical equation is coupled to a causal transport equation in the context of Israel-Stewart theory. The decrease of the inertial mass density of the fluid, by a factor which depends on its internal thermodynamic state, is reobtained, with the viscosity terms included. In accordance with the equivalence principle, the same decrease factor is obtained for the gravitational force term. The effect of the electric charge on the relation between the Weyl tensor and the inhomogeneity of energy density is discussed.2

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Section: Discussionmentioning

confidence: 99%

“…Although some of these works refer to static situations ( [3]- [5], [9,19,23,24,29,30], [32]- [34], [36,37,39,41]) there have been important efforts in describing dynamical situations too ( [6]- [8], [10]- [14], [16,17,21,22,26,40,42]). Particularly relevant for the present paper are references [14,22] and [40].…”

Section: Introductionmentioning

confidence: 99%

Nonadiabatic charged spherical gravitational collapse

et al. 2007

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“…Most of the formalism shown in this section is on the format presented by Ray et al [4], whose results we wanted to reproduce at first.…”

Section: The Structure Of Charged Compact Starsmentioning

confidence: 99%

“…One of them relates the charge density ρ ch and the fluid energy density ε. It is actually not easy to guess what this relation should be, so we use, for simplicity, the relation suggested by [4]:…”

Section: The Structure Of Charged Compact Starsmentioning

confidence: 99%

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Compact charged stars

Siffert¹,

Neto²,

Calvão³

2007

Braz. J. Phys.

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We investigate the possibility that charged compact objects could be the accelerators of high energy cosmic rays. In order to do so, we choose to first solve numerically a system of differential equations describing the structure of charged compact objects, including the generalization of the Tolman-Oppenheimer-Volkoff equation for this class of objects. We assume a polytropic equation of state for the fluid and, for simplicity, a linear relation between charge density and the fluid energy density. We obtain upper limits for the charge such objects can acquire and study the stability of these equilibrium configurations.

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Gravitational Lensing in a Model of Nonlinear Electrodynamics: The Case for Electrically and Magnetically Charged Compact Objects

Gürtuğ

Mangut

2020

Annalen der Physik

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The astrophysical applicability of the electrically and magnetically charged black hole solutions obtained in a model of nonlinear electrodynamics proposed by Kruglov is investigated. Theoretical calculations of the bending angles and gravitational redshifts from the theory of general relativity are studied numerically by using the stellar data of charged compact objects and a hypothetical quark star model. Calculations have revealed that although the theoretical outcomes differ from the linear Maxwell case, the plotted bending angles coincide with the linear case and it becomes hard to identify the effect of nonlinearity. However, the calculation of the redshift has shown that while the increase in the electric field leads to a decrease in the gravitational redshift,the presence of the strong magnetic field contributes to the gravitational redshift in an increasing manner.

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Electrically charged compact stars and formation of charged black holes

Cited by 256 publications

References 19 publications

Nonadiabatic charged spherical gravitational collapse

Nonadiabatic charged spherical gravitational collapse

Compact charged stars

Gravitational Lensing in a Model of Nonlinear Electrodynamics: The Case for Electrically and Magnetically Charged Compact Objects

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