Generating solutions for charged stellar models in general relativity

Иванов, Б. В.

doi:10.1140/epjc/s10052-021-09025-8

Cited by 16 publications

(9 citation statements)

References 79 publications

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“…[45]. We further remark that when f (R) = R, the third integral on the right-hand side of the equation above vanishes and hence we recover the typical expression obtained in the pure GR scenario [5,6,9,12,17,18,20]. However, notice that even in the exterior region of an electrically charged compact star, where ρ = 0, the above expression yields an extra mass contribution due to the non-trivial behaviour of the Ricci scalar.…”

Section: As a Consequence Bearing In Mind Thatsupporting

confidence: 81%

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Charged quark stars in f(R,T) gravity*

Pretel¹,

Tangphati²,

Banerjee³

et al. 2022

Chinese Phys. C

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Recent advances in nuclear theory combined with new astrophysical observations have led to the need for specific theoretical models that actually apply to phenomena on dense-matter physics. At the same time, quantum chromodynamics (QCD) predicts the existence of non-nucleonic degrees of freedom at high densities in neutron-star matter, such as quark matter. Within a confining quark matter model, which consists of homogeneous, neutral 3-flavor interacting quark matter with $\mathcal{O}(m_s^4)$ corrections, we study the structure of compact stars made of a charged perfect fluid in the context of $f(R,T)$ gravity. The system of differential equations that describe the structure of charged compact stars have been derived and solved numerically for a gravity model with $f(R,T)= R+ 2\beta T$. For simplicity, we assume that the charge density is proportional to the energy density, namely, $\rho_{\rm ch} = \alpha \rho$. It is demonstrated that matter-geometry coupling constant $\beta$ and the charge parameter $\alpha$ affect the total gravitational mass and the radius of the star.

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Section: As a Consequence Bearing In Mind Thatsupporting

confidence: 81%

“…Additional results on the impact of electric charge on the global properties of compact stars can be found in Refs. [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Charged quark stars in f(R,T) gravity*

Pretel¹,

Tangphati²,

Banerjee³

et al. 2022

Chinese Phys. C

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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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“…We shall start by imposing the quasi-homologous condition (46). Then using (119) and ( 120) in (46) we get 4πqA…”

Section: Conformal Motions: Exact Solutionsmentioning

confidence: 99%

Non-static fluid spheres admitting a conformal Killing vector: Exact solutions

Herrera¹,

Prisco²,

Ospino³

2022

Preprint

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We carry on a general study on non-static spherically symmetric fluids admitting a conformal Killing vector (CKV). Several families of exact analytical solutions are found for different choices of the CKV, in both, the dissipative and the adiabatic regime. To specify the solutions, besides the fulfillment of the junction conditions on the boundary of the fluid distribution, different conditions are imposed, such as vanishing complexity factor and quasi-homologous evolution. A detailed analysis of the obtained solutions, its prospective applications to astrophysical scenarios, as well as alternative approaches to obtain new solutions, are discussed.

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Generating solutions for charged stellar models in general relativity

Cited by 16 publications

References 79 publications

Charged quark stars in f(R,T) gravity*

Charged quark stars in f(R,T) gravity*

Radiating composite stars with electromagnetic fields

Non-static fluid spheres admitting a conformal Killing vector: Exact solutions

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