Relativistic modeling of the neutron star in Vela X-1 via Bardeen space-time satisfying the embedding condition

被引：5

作者：

Gedela, Satyanarayana ^{[1
]}

Bisht, Ravindra K. ^{[2
]}

Pant, Neeraj ^{[2
]}

Upreti, Jaya ^{[1
]}

Pant, R. P. ^{[3
]}

机构：

[1] Kumaun Univ, Dept Math, SSJ Campus, Almora 263601, India

[2] Natl Def Acad, Dept Math, Pune 411023, Maharashtra, India

[3] Graph Era Hill Univ, Bhimtal Campus,Sattal Rd, Bhimtal 263132, India

来源：

NEW ASTRONOMY | 2021年 / 87卷

关键词：

Bardeen space-time; Karmarkar condition; Anisotropy; Compact stars; Einstein-Maxwell field equations; APPROACHING SCHWARZSCHILD LIMIT; EQUATION-OF-STATE; DYNAMICAL INSTABILITY; ANISOTROPIC STARS; CHARGED FLUID; MASS; SPHERES; COLLAPSE; CRACKING; ANALOG;

D O I：

10.1016/j.newast.2021.101583

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we present two new exact and analytic solutions of the Einstein-Maxwell field equations describing compact anisotropic charged stars satisfying the Karmarkar condition in the background of Bardeen black hole geometry. The solutions are composed of two parts: The inner region of the star is described by class I Karmarkar space-time, while exterior of the star is characterized by both the Bardeen and the Reissner-Nordstrom spacetimes. Physical analysis of the matter and thermodynamical variables show that the models are well-behaved. For our parametric set of values, we conclude that the Bardeen black hole metric can be used as an alternate to the exterior Reissner-Nordstrom metric.

引用

页数：14

共 89 条

[1] Sound speeds, cracking and the stability of self-gravitating anisotropic compact objects
Abreu, H.
Hernandez, H.
Nunez, L. A.
[J]. CLASSICAL AND QUANTUM GRAVITY, 2007, 24 (18) : 4631 - 4645
[2] [Anonymous], 1990, ASTRON ASTROPHYS
[3] The Bardeen model as a nonlinear magnetic monopole
Ayón-Beato, E
García, A
[J]. PHYSICS LETTERS B, 2000, 493 (1-2) : 149 - 152
[4] Relativistic anisotropic stellar models with Tolman VII spacetime
Bhar, Piyali
Murad, Mohammad Hassan
Pant, Neeraj
[J]. ASTROPHYSICS AND SPACE SCIENCE, 2015, 359 (01)
[5] Singularity-free anisotropic strange quintessence star
Bhar, Piyali
[J]. ASTROPHYSICS AND SPACE SCIENCE, 2015, 356 (02) : 309 - 318
[6] Bounds on the basic physical parameters for anisotropic compact general relativistic objects
Bohmer, C. G.
Harko, T.
[J]. CLASSICAL AND QUANTUM GRAVITY, 2006, 23 (22) : 6479 - 6491
[7] CONTRACTION OF GRAVITATING SPHERES
BONDI, H
[J]. PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1964, 281 (1384) : 39 - +
[8] Bonnor W., 1965, Mon. Not. R. Astron. Soc., V129, P443, DOI DOI 10.1093/MNRAS/129.6.443
[9] ANISOTROPIC SPHERES IN GENERAL RELATIVITY
BOWERS, RL
LIANG, EPT
[J]. ASTROPHYSICAL JOURNAL, 1974, 188 (03) : 657 - 665
[10] BUCHDAHL HA, 1979, ACTA PHYS POL B, V10, P673

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