Magnetized Tolman-Bondi collapse

Germani, Cristiano; Tsagas, Christos G.

doi:10.1103/physrevd.73.064010

Cited by 11 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…( 8), namely c 2 a R ab n a n b and ua ua . The latter has been analysed within a collapsing perturbed Tolman-Bondi spacetime in [7], where it was found to grow faster than all the other terms in the right-hand side of the Raychaudhuri equation. Here we will focus on the magneto-curvature tension stress instead.…”

Section: The Magnetic Tension Stressesmentioning

confidence: 99%

Magnetic tension and gravitational collapse

Tsagas¹

2006

Class. Quantum Grav.

View full text Add to dashboard Cite

The gravitational collapse of a magnetised medium is investigated by studying qualitatively the convergence of a timelike family of non-geodesic worldlines in the presence of a magnetic field. Focusing on the field's tension we illustrate how the winding of the magnetic forcelines due to the fluid's rotation assists the collapse, while shear-like distortions in the distribution of the field's gradients resist contraction. We also show that the relativistic coupling between magnetism and geometry, together with the tension properties of the field, lead to a magneto-curvature stress that opposes the collapse. This tension stress grows stronger with increasing curvature distortion, which means that it could potentially dominate over the gravitational pull of the matter. If this happens, a converging family of non-geodesic lines can be prevented from focusing without violating the standard energy conditions. PACS number(s): 04

show abstract

Section: The Magnetic Tension Stressesmentioning

confidence: 99%

Magnetic tension and gravitational collapse

Tsagas¹

2006

Class. Quantum Grav.

View full text Add to dashboard Cite

show abstract

“…Thorne established that the solution is absolutely stable against radial perturbations and does not collapse to a singularity or undergo dispersal [26]. Following these works, it has been found by many authors that magnetic fields do have an inherent ability to resist the gravitational contraction [8,9,10,11,16,27]. This is because magnetic force lines repel each other.…”

Section: Introductionmentioning

confidence: 97%

“…electromagnetism) can alter the fate of gravitational collapse so that formation of singularity can be avoided. A significant amount of research has been done in this direction which can be found in [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22] and references therein. For example, the role of a repulsive Coulomb force in this context has been studied in [13,14,15,22,10].…”

Section: Introductionmentioning

confidence: 99%

Role of a magnetic field in the context of inhomogeneous gravitational collapse

Choudhury

2022

Preprint

View full text Add to dashboard Cite

Magnetic fields are found to have an inherent capability of acting against gravity. An important question posed in the literature is whether presence of a magnetic field can alter the dynamics of a gravitational collapse and prevent the final formation of a singularity. Promising conclusions regarding this have been found in a few recent works considering nearly homogeneous models. However, whether this can happen in realistic collapse scenarios is still not very clear and remains an open problem.In the present work we investigate the role of magnetic fields in the evolution of inhomogeneous cylindrically symmetric models. We use an approach based on the Raychaudhuri equation for such an analysis. We show that it is quite possible for the magnetic field to avert the gravitational collapse in these models.

show abstract

“…Stein-Schabes [29] investigated that charged matter collapse may produce naked singularity instead of a black hole. Germani and Tsagas [30] discussed the collapse of magnetized dust in TolmanBondi model. Recently, Herrera and his collaborators [31,32] have discussed the role of electromagnetic field on the structure scalars and dynamics of self-gravitating objects.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic effect on scalar field collapse in higher curvature gravity

Banerjee

Paul

2019

Gen Relativ Gravit

View full text Add to dashboard Cite

We consider a "Scalar-Maxwell-Einstein-Gauss-Bonnet" theory in four dimension, where the scalar field couples non-minimally with the Gauss-Bonnet (GB) term. This coupling with the scalar field ensures the non topological character of the GB term. In such higher curvature scenario, we explore the effect of electromagnetic field on scalar field collapse. Our results reveal that the presence of a time dependent electromagnetic field requires an anisotropy in the background spacetime geometry and such anisotropic spacetime allows a collapsing solution for the scalar field. The singularity formed as a result of the collapse is found to be a curvature singularity which may be point like or line like depending on the strength of the anisotropy. We also show that the singularity is always hidden from exterior by an apparent horizon. *

show abstract

Magnetized Tolman-Bondi collapse

Cited by 11 publications

References 23 publications

Magnetic tension and gravitational collapse

Magnetic tension and gravitational collapse

Role of a magnetic field in the context of inhomogeneous gravitational collapse

Electromagnetic effect on scalar field collapse in higher curvature gravity

Contact Info

Product

Resources

About