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In this article we consider the static spherically symmetric metric of embedding class 1. When solving the Einstein-Maxwell field equations we take into account the presence of ordinary baryonic matter together with the electric charge. Specific new charged stellar models are obtained where the solutions are entirely dependent on the electromagnetic field, such that the physical parameters, like density, pressure etc. do vanish for the vanishing charge. We systematically analyze altogether the three sets of Solutions I, II, and III of the stellar models for a suitable functional relation of ν(r ). However, it is observed that only the Solution I provides a physically valid and well-behaved situation, whereas the Solutions II and III are not well behaved and hence not included in the study. Thereafter it is exclusively shown that the Solution I can pass through several standard physical tests performed by us. To validate the solution set presented here a comparison has also been made with that of the compact stars, like R X J 1856 − 37, Her X − 1, P S R 1937 + 21, P S R J 1614 − 2230, and P S R J 0348 + 0432, and we have shown the feasibility of the models.

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“…For further studies on different aspects of electromagnetic mass models, see Refs. [32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Spherically symmetric charged compact stars

Maurya

Gupta

Ray³

et al. 2015

Eur. Phys. J. C

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129

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“…The polytropic equation of state has been used in various astrophysical situations; for example, it can explain the equation of state of degenerate white dwarfs, neutron stars, the equation of state of main sequence stars [22], and in the case of Lane-Emden models [23,24]. The equation of state of the polytropic model may be seen in mathematical biology [25,28], statistical physics [26], and astronomy [27].…”

Section: Introductionmentioning

confidence: 99%

Tachyon-polytropic inflation on the brane

Setare

Kamali

2013

Open Physics

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Abstract:We consider the tachyon-brane inflationary universe model in the context of a polytropic gas equation of state. In slow-roll approximation, we discuss general conditions of this model. For exponential potential, in high-energy limit the characteristics of the model are presented. By using the seven-year Wilkinson Microwave Anisotropy Probe (WMAP7) observational data, we constrain the cosmological parameters of the model. PACS (2008):

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“…Historically, the concept of electromagnetic mass model (EMMM) with vanishing charge density along with other physical parameters was first proposed by Lorentz [17] and later on by several other authors [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. It can be observed that in all these electromagnetic mass models the fluid has a negative pressure and hence we have repulsive gravity in the form of the equation of state (EOS) ρ + p = 0, due to vacuum polarization, where ρ and p represent the density and the pressure, respectively.…”

Section: Introductionmentioning

confidence: 99%

A new model for spherically symmetric charged compact stars of embedding class 1

Maurya

Gupta²,

Ray

et al. 2017

Eur. Phys. J. C

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In the present study we search for a new stellar model with spherically symmetric matter and a charged distribution in a general relativistic framework. The model represents a compact star of embedding class 1. The solutions obtained here are general in nature, having the following two features: first of all, the metric becomes flat and also the expressions for the pressure, energy density, and electric charge become zero in all the cases if we consider the constant A = 0, which shows that our solutions represent the so-called 'electromagnetic mass model ' [17], and, secondly, the metric function ν(r ), for the limit n tending to infinity, converts to ν(r ) = Cr 2 + ln B, which is the same as considered by Maurya et al. [11]. We have investigated several physical aspects of the model and find that all the features are acceptable within the requirements of contemporary theoretical studies and observational evidence.

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Cited by 15 publications

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Spherically symmetric charged compact stars

Spherically symmetric charged compact stars

Tachyon-polytropic inflation on the brane

A new model for spherically symmetric charged compact stars of embedding class 1

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