Nonadiabatic charged spherical gravitational collapse

Prisco, A. Di; Herrera, L.; Denmat, G. Le; MacCallum, Malcolm; Santos, N. O.

doi:10.1103/physrevd.76.064017

Cited by 185 publications

(164 citation statements)

References 71 publications

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“…However, the fact that such a relationship is no longer valid in the presence of local anisotropy of the pressure and/or dissipative processes and/or electric charge. This has already been discussed [32,39] explaining its failure in scenarios where the above-mentioned factors are present [40]. Here we see how the electric charge distribution affects the link between the Weyl tensor and density inhomogeneity, suggesting that electric charge (whenever present) should enter into any definition of a gravitational arrow of time.…”

Section: Relation Between the Weyl Tensor And Matter Variablesmentioning

confidence: 68%

“…The same authors extended this work for 5D collapse [31] and found that the range of apparent horizon is greater than 4D case. Di Prisco et al [32] figured out the consequences of charge and dissipation for spherical symmetric gravitational collapse of a real fluid. It was assumed that heat flow, free streaming radiation and shearing viscosity are the causes of dissipation.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of charged plane symmetric gravitational collapse

Sharif

Siddiqa

2010

Gen Relativ Gravit

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In this paper, we study dynamics of the charged plane symmetric gravitational collapse. For this purpose, we discuss non-adiabatic flow of a viscous fluid and deduce the results for adiabatic case. The Einstein and Maxwell field equations are formulated for general plane symmetric spacetime in the interior. Junction conditions between the interior and exterior regions are derived. For the non-adiabatic case, the exterior is taken as plane symmetric charged Vaidya spacetime while for the adiabatic case, it is described by plane ReissnerNordström spacetime. Using Misner and Sharp formalism, we obtain dynamical equations to investigate the effects of different forces over the rate of collapse. In non-adiabatic case, a dynamical equation is joined with transport equation of heat flux. Finally, a relation between the Weyl tensor and energy density is found.

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Section: Relation Between the Weyl Tensor And Matter Variablesmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Dynamics of charged plane symmetric gravitational collapse

Sharif

Siddiqa

2010

Gen Relativ Gravit

View full text Add to dashboard Cite

show abstract

“…Since then many people have considered the effect of electromagnetic charge on the structure and evolution of self-gravitating systems [10]- [14]. Di Prisco et al [15] explored the effect of charge on the relation between the Weyl tensor and the inhomogeneity of energy density and concluded that Coulomb repulsion might prevent the gravitational collapse of the sphere. Thirukkanesh and Maharaj [16] investigated that gravitational attraction is compensated by the Coulomb's repulsive force along with gradient pressure in a gravitational collapse.…”

Section: Introductionmentioning

confidence: 99%

Effects of electromagnetic field on the dynamical instability of expansionfree gravitational collapse

Sharif

Azam

2012

Gen Relativ Gravit

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In this paper, we discuss the effects of electromagnetic field on the dynamical instability of a spherically symmetric expansionfree gravitational collapse. Darmois junction conditions are formulated by matching interior spherically symmetric spacetime to exterior Reissner-Nordström spacetime. We investigate the role of different terms in the dynamical equation at Newtonian and post Newtonian regimes by using perturbation scheme. It is concluded that instability range depends upon pressure anisotropy, radial profile of energy density and electromagnetic field, but not on the adiabatic index Γ. In particular, the electromagnetic field reduces the unstable region.

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“…Di Prisco et al [17] looked into non-adiabatic spherically symmetric collapsing process and explored the role of energy density inhomogeneities. Chuang et al [18] explored the possibilities of emergence of inhomogeneities for acceleratory expanding universe.…”

Section: Introductionmentioning

confidence: 99%

Role of tilted congruence and f(R) gravity on regular compact objects

2017

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The purpose of this paper is to check the impact of observer and Palatini f (R) terms in the formulations of inhomogeneity factors of spherical relativistic systems. We consider Lemaître-Tolman-Bondi dynamical model as a compact object and studied its evolution with both tilted and non-tilted observers. We performed our analysis for particular cases of fluid distribution in tilted frame and found some energy density irregularity variables. We found that these variables are drastically different from those observed by non-tilted observer. The conformal flat dust and perfect matter contents are homogeneous as long as they impregnate vacuum core. However, this restriction is relaxed, when the complexity in the fluid description is increased. The radial fluid velocity due to tilted congruences and Palatini f (R) curvature terms tend to produce hindrances in the appearance of energy-density inhomogeneities in the initially regular spherical stellar populations.

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Nonadiabatic charged spherical gravitational collapse

Cited by 185 publications

References 71 publications

Dynamics of charged plane symmetric gravitational collapse

Dynamics of charged plane symmetric gravitational collapse

Effects of electromagnetic field on the dynamical instability of expansionfree gravitational collapse

Role of tilted congruence and f(R) gravity on regular compact objects

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