Impact of generalized polytropic equation of state on charged anisotropic polytropes

Mardan, S. A.; Rehman, M. A.; Noureen, Ifra; Jamil, Raja Noshad

doi:10.1140/epjc/s10052-020-7647-x

Cited by 13 publications

(16 citation statements)

References 27 publications

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“…It has been demonstrated that the presence of charge affects the rate of gravitational collapse, luminosities, stellar masses and other physical features. Some recent examples of charged static stars and their interesting properties are given in [1][2][3][4][5][6]. In radiating stars, the radial pressure at the stellar boundary is nonvanishing [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Radiating composite stars with electromagnetic fields

Maharaj

Brassel

2021

Eur. Phys. J. C

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We derive the junction conditions for a general spherically symmetric radiating star with an electromagnetic field across a comoving surface. The interior consists of a charged composite field containing barotropic matter, a null dust and a null string fluid. The exterior atmosphere is described by the generalised Vaidya spacetime. We generate the boundary condition at the stellar surface showing that the pressure is determined by the interior heat flux, anisotropy, null density, charge distribution and the exterior null string density. A new physical feature that arises in our analysis is that the surface pressure depends on the internal charge distribution for generalised Vaidya spacetimes. It is only in the special case of charged Vaidya spacetimes that the matching interior charge distribution is equal to the exterior charge at the surface as measured by an external observer. Previous treatments, for neutral matter and charged matter, arise as special cases in our treatment of composite matter.

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Section: Introductionmentioning

confidence: 99%

Radiating composite stars with electromagnetic fields

Maharaj

Brassel

2021

Eur. Phys. J. C

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“…Pandya et al [103], Bhar et al [104] studied the static spherically symmetric relativistic anisotropic compact object considering the Tolman VII solution as one of the metric potentials. Mardan et al [203] has used polytropic EoS to generate solutions. New anisotropic models of a strange star admitting the Chaplygin equation of state was proposed by Bhar [206], Kumar et al [208], etc.…”

Section: Anisotropy and Its Effectmentioning

confidence: 99%

“…Solutions to the Einstein field equations admitting a polytropic equation of state are not common with physical viable solutions being a rarity. For recent works on anisotropic stellar modeling by employing polytropic EoS one can go through the papers [199][200][201][202][203]. We have enlisted some metrics in Table XI which have been used to study the anisotropic stellar modeling with polytropic EoS and discussed the solutions briefly.…”

Section: E Polytropic Equation Of Statementioning

confidence: 99%

“…They made a physically acceptable choice for the electric field as E = √ c + dr 2 and one metric potential as 1 (br 2 +a) 2 , with constants a, b, c and d. They have regained the masses of realistic strange stars 4U 1820-30, PSR J1614-2230, PSR J1903+327, Vela 4U, and Vela X-1 that show the viability of the model. Mardan et al [203]: In this paper, generalized polytropic equation of state is used to generate well behaved and physically viable new classes of polytropic models from the solution of Einstein-Maxwell field equations for charged anisotropic fluid configuration. They have discussed four different values of the polytropic index (η=1, 1 2 , 2) to ascertain the solution.…”

Section: E Polytropic Equation Of Statementioning

confidence: 99%

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The classification of interior solutions of anisotropic fluid configurations

Kumar¹,

Bharti²

2021

Preprint

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The solutions of the Einstein-Maxwell system of equations, useful for the modeling of compact stars have a long and rich history. It took just a year since Einstein's general theory of relativity was published for Karl Schwarzschild to obtain the first exact solution of Einstein's field equations. The number of viable exact solutions has been growing since then. Different models have been constructed for a variety of applications. In this article, we have discussed different ways of generating a static spherically symmetric anisotropic fluid model. The purpose of the present article is to present a simple classification scheme for static and spherically symmetric anisotropic fluid solutions. The known solutions are reviewed and compartmentalized according to this scheme so that we can illustrate general ideas about these solutions without being exhaustive.

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“…They found exact solutions of field equations by taking different values of polytropic index n and analyzed some mathematical models which were found physically viable and well behaved. Mardan et al [29,30] established new classes of polytropic models using spherical symmetry and analyzed the mass and radius of different astronomical objects.…”

Section: Introductionmentioning

confidence: 99%

Study of generalized cylindrical polytropes with complexity factor

2021

Self Cite

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In this paper, complexity factor is used with generalized polytropic equation of state to develop two consistent systems of three differential equations and a general frame work is established for modify form of Lane-Emden equations. For this purpose anisotropic fluid distribution is considered in cylindrical static symmetry with two cases of generalized polytropic equation of state (i) mass density $$\mu _{o}$$ μ o and (ii) energy density $$\mu $$ μ . A graphical analysis will be carried out for the numerical solution of these systems of three differential equations.

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Impact of generalized polytropic equation of state on charged anisotropic polytropes

Cited by 13 publications

References 27 publications

Radiating composite stars with electromagnetic fields

Radiating composite stars with electromagnetic fields

The classification of interior solutions of anisotropic fluid configurations

Study of generalized cylindrical polytropes with complexity factor

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