Electrically charged isotropic stars with Tolman-IV model

被引：18

作者：

Errehymy, Abdelghani ^{[1
,2
]}

Mustafa, G. ^{[3
]}

Singh, Ksh. Newton ^{[4
]}

Maurya, S. K. ^{[5
]}

Daoud, Mohammed ^{[6
,7
]}

Alrebdi, H. I. ^{[8
]}

Abdel-Aty, Abdel-Haleem ^{[9
,10
]}

机构：

[1] Univ KwaZulu Natal, Astrophys Res Ctr, Sch Math Stat & Comp Sci, Private Bag X54001, ZA-4000 Durban, South Africa

[2] Hassan II Univ Casablanca, Fac Sci Ain Chock, Dept Phys, Lab High Energy Phys & Condensed Matter, POB 5366, Maar 20100, Casablanca, Morocco

[3] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China

[4] Natl Def Acad, Dept Phys, Pune 411023, India

[5] Univ Nizwa, Coll Arts & Sci, Dept Math & Phys Sci, Nizwa, Oman

[6] Ibn Tofail Univ, Fac Sci, Dept Phys, POB 133, Kenitra 14000, Morocco

[7] Abdus Salam Int Ctr Theoret Phys, I-34151 Trieste, Italy

[8] Princess Nourah bint Abdulrahman Univ, Coll Sci, Dept Phys, POB 84428, Riyadh 11671, Saudi Arabia

[9] Univ Bisha, Coll Sci, Dept Phys, POB 344, Bisha 61922, Saudi Arabia

[10] Al Azhar Univ, Fac Sci, Dept Phys, Assiut 71524, Egypt

来源：

NEW ASTRONOMY | 2023年 / 99卷

关键词：

Exact solution; Compact star; General relativity; Electric charge; APPROACHING SCHWARZSCHILD LIMIT; GENERAL-RELATIVITY; ANISOTROPIC STARS; DYNAMICAL INSTABILITY; EMBEDDING APPROACH; GRAVITATION FIELD; COMPACT OBJECT; FLUID; SPHERES; COLLAPSE;

D O I：

10.1016/j.newast.2022.101957

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The paper discusses novel solutions of Einstein-Maxwell field equations by describing the static spherically symmetric isotropic matter distributions and electrifying a well-known uncharged model in general relativity. We start by selecting a Tolman-IV type potential for the gravitational potential g(tt) and a physically reasonable choice for the electric field intensity E in view to exploiting isotropic sources of matter which act as a basis for generating confined compact stars. These solutions are constructed to match interior space-time geometries with exterior Reissner-Nordstrom solution at the pressure-free boundary. The viability of the models is compared with observational data of some heavy pulsars coming from the Neutron Star Interior Composition Explorer (NICER). In particular, Her X-1, SAX J1808.4-3658, and 4U 1538-52 are considered. We stretch our findings by measuring the mass-radius relationship for our developed model, which reveals that the predicted radii via the M-R curve are lying in the range of R <= 14-16 km. Moreover, the generated model satisfies all of the required major physical properties for realistic compact stars. We can also say that this approach can play a vital role in encouraging the study of the electrification of well-known neutral stellar systems.

引用

页数：9