4,379 research outputs found
Mechanical Stability of Cylindrical Thin-Shell Wormholes
In this paper, we apply the cut and paste procedure to charged black string
for the construction of thin-shell wormhole. We consider the Darmois-Israel
formalism to determine the surface stresses of the shell. We take Chaplygin gas
to deal with the matter distribution on shell. The radial perturbation approach
(preserving the symmetry) is used to investigate the stability of static
solutions. We conclude that stable static solutions exist both for uncharged
and charged black string thin-shell wormholes for particular values of the
parameters.Comment: 13 pages, 2 figures, Reference update
Cracking of Charged Polytropes with Generalized Polytropic Equation of State
We discuss the occurrence of cracking in charged anisotropic polytropes with
generalized polytropic equation of state through two different assumptions; (i)
by carrying out local density perturbations under conformally flat condition
(ii) by perturbing anisotropy, polytropic index and charge parameters. For this
purpose, we consider two different definitions of polytropes exist in
literature. We conclude that under local density perturbations scheme cracking
does not appears in both types of polytropes and stable configuration are
observed, while with second kind of perturbation cracking appears in both types
of polytropes under certain conditions.Comment: 24 pages, 11 figure
Fate of Electromagnetic Field on the Cracking of PSR J1614-2230 in Quadratic Regime
In this paper, we study the cracking of compact object PSR J1614-2230 in
quadratic regime with electromagnetic field. For this purpose, we develop a
general formalism to determine the cracking of charged compact objects. We
apply the local density perturbations to the hydrostatic equilibrium equation
as well as all the physical variables involve in the model. We plot the force
distribution function against radius of the star with different values of model
parameters both with and without charge. It is found that PSR J1614-2230
remains stable (no cracking) corresponding to different values of parameters
when charge is zero, while it exhibit cracking (unstable) when charge is
introduced. We conclude that stability region increases as amount of charge
increases.Comment: 21 pages, 8 figures, version to appear in advances in high energy
physic
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