Higher dimensional charged gravastar admitting conformal motion

Bhar, Piyali

doi:10.1007/s10509-014-2109-2

Cited by 85 publications

(70 citation statements)

References 14 publications

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“…(11), (12), (18) and (19) one can get the following relation between the metric potentials ν and λ as…”

Section: The Field Equations and Their Solutions In F (R T ) Grmentioning

confidence: 99%

“…However, these works are mainly carried out by several authors in the framework of Einstein's general relativity [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Though it is well known that Einstein's general relativity is a unique tool for uncovering many hidden mysteries of Nature, yet some observational evidences of the accelerating universe along with the existence of dark matter has imposed a theoretical challenge to this theory [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gravastars in f(R,T) gravity

Das¹,

Ghosh²,

Guha³

et al. 2017

Phys. Rev. D

185

118

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We propose a unique stellar model under the f (R, T ) gravity by using the conjecture of MazurMottola [P. Mazur and E. Mottola, Report number: LA-UR-01-5067., P. Mazur and E. Mottola, Proc. Natl. Acad. Sci. USA 101, 9545 (2004).] which is known as gravastar and a viable alternative to the black hole as available in literature. This gravastar is described by the three different regions, viz., (I) Interior core region, (II) Intermediate thin shell, and (III) Exterior spherical region. The pressure within the interior region is equal to the constant negative matter density which provides a repulsive force over the thin spherical shell. This thin shell is assumed to be formed by a fluid of ultrarelativistic plasma and the pressure, which is directly proportional to the matter-energy density according to Zel'dovich's conjecture of stiff fluid [Y.B. Zel'dovich, Mon. Not. R. Astron. Soc. 160, 1 (1972).], does counterbalance the repulsive force exerted by the interior core region. The exterior spherical region is completely vacuum and assumed to be de Sitter spacetime which can be described by the Schwarzschild solution. Under this specification we find out a set of exact and singularity-free solution of the gravastar which presents several other physically valid features within the framework of alternative gravity.

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“…(11), (12), (18) and (19) one can get the following relation between the metric potentials ν and λ as…”

Section: The Field Equations and Their Solutions In F (R T ) Grmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gravastars in f(R,T) gravity

Das¹,

Ghosh²,

Guha³

et al. 2017

Phys. Rev. D

185

118

View full text Add to dashboard Cite

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“…A charged gravastar admitting conformal motion has been studied by Usmani et al [32]. Contrary to this work Bhar [33] has studied a higher-dimensional charged gravastar admitting conformal motion, whereas a relativistic star admitting conformal motion has been analyzed by Rahaman et al [34]. Inspired by this earlier work on conformal motion we are looking for a new class of solutions of anisotropic stars under the framework of general relativity inspired by noncommutative geometry in 4-and higherdimensional spacetimes.…”

Section: Introductionmentioning

confidence: 99%

Possibility of higher-dimensional anisotropic compact star

et al. 2015

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We provide a new class of interior solutions for anisotropic stars admitting conformal motion in higherdimensional noncommutative spacetime. The Einstein field equations are solved by choosing a particular density distribution function of Lorentzian type as provided by Nazari and Mehdipour [1,2] under a noncommutative geometry. Several cases with 4 and higher dimensions, e.g. 5, 6, and 11 dimensions, are discussed separately. An overall observation is that the model parameters, such as density, radial pressure, transverse pressure, and anisotropy, all are well behaved and represent a compact star with mass 2.27 M and radius 4.17 km. However, emphasis is put on the acceptability of the model from a physical point of view. As a consequence it is observed that higher dimensions, i.e. beyond 4D spacetime, exhibit several interesting yet bizarre features, which are not at all untenable for a compact stellar model of strange quark type; thus this dictates the possibility of its extra-dimensional existence.

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“…A few interesting applications of conformal motion to astrophysical field can be found in the following Refs. Ray et al (2008), Rahaman et al (2010aRahaman et al ( ,b, 2014Rahaman et al ( , 2015b, Usmani et al (2011) andBhar (2014). In this line of investigations some special mention are of the very recent works of Rahaman et al (2015a) and Bhar et al (2015).…”

Section: Introductionmentioning

confidence: 96%