Physical characteristics and maximum allowable mass of hybrid star in the context of f (Q) gravity

被引:43
|
作者
Bhar, Piyali [1 ]
Pradhan, Sneha [2 ]
Malik, Adnan [3 ,4 ]
Sahoo, P. K. [2 ,5 ]
机构
[1] Govt Gen Degree Coll Singur, Dept Math, Hooghly 712409, W Bengal, India
[2] Birla Inst Technol & Sci Pilani, Dept Math, Hyderabad Campus, Hyderabad 500078, India
[3] Zhejiang Normal Univ, Sch Math Sci, Jinhua, Zhejiang, Peoples R China
[4] Univ Management & Technol, Dept Math, Sialkot Campus, Sialkot, Pakistan
[5] Transilvania Univ Brasov, Fac Math & Comp Sci, Eroilor 29, Brasov, Romania
来源
EUROPEAN PHYSICAL JOURNAL C | 2023年 / 83卷 / 07期
关键词
NEUTRON-STARS; COMPACT STARS; DYNAMICAL INSTABILITY; LINEAR-EQUATION; RADIUS; INFLATION; CRACKING; BINARY; MODEL; LIMIT;
D O I
10.1140/epjc/s10052-023-11745-y
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
In this study, we explore several new characteristics of a static anisotropic hybrid star with strange quarkmatter (SQM) and ordinary baryonicmatter (OBM) distribution. Here, we use the MIT bag model equation of state to connect the density and pressure of SQM inside stars, whereas the linear equation of state p(r) = alpha rho - beta connects the radial pressure and matter density caused by baryonic matter. The stellar model was developed under a background of f (Q) gravity using the quadratic form of f (Q). We utilized the Tolman-Kuchowicz ansatz (Tolman in Phys. Rev. 55:364-373, 1939; Kuchowicz in Acta Phys Pol 33: 541, 1968) to find the solutions to the field equations under modified gravity. We have matched the interior solution to the external Schwarzschild spacetime in order to acquire the numerical values of themodel parameters. We have selected the starHer X-1 to develop various profiles of themodel parameters. Several significant physical characteristics have been examined analytically and graphically, including matter densities, tangential and radial pressures, energy conditions, anisotropy factor, redshirt, compactness, etc. The main finding is that there is no core singularity present in the formations of the star under investigation. The nature of mass and the bag constant B-g have been studied in details through equi-mass and equi- B-g contour. The maximum allowable mass and the corresponding radius have been obtained via M - R plots.
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页数:19
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