Abstract:
The strange quark matter (SQM) whose distribution is governed by the simplified MIT bag model equation of state has been the subject of a series of investigations within the framework of Rastall's theory. We obtain an exact solution of the modified form of the Tolman–Oppenheimer–Volkoff (TOV) equation in the Rastall gravity theory and study the dependence of different physical properties (the total mass, radius, energy density, and pressure) for the chosen values of the Rastall parameter λRas. To examine physical acceptability of the proposed stellar model, we conduct different tests in detail: the energy conditions, the the mass–radius relation, the Compactification factor, the redshift, the system stability, the modified TOV equation, the causality condition, and the adiabatic index in terms of λRas. We precisely explain the effects arising due to the Rastall parameter and geometry on the compact stellar system. We find that as the factor λRas decreases, the strange star candidates become gradually massive and larger in size with a less dense stellar configuration. But when λRas increases, the stars shrink gradually and become less massive, turning into a more compact stellar system. For λRas>0, our proposed model is therefore suitable for explaining the ultradense compact stars well within the observational limits; for λRas<0, it allows representing the recent massive pulsars and super-Chandrasekhar stars. For λRas=1, we retrieve the standard results of general relativity.
Keywords:
dark energy theory, Rastall gravity, massive star.
Citation:
I. G. Salako, D. R. Boko, G. F. Pomalegni, M. Z. Arouko, “Study on anisotropic strange stars in Rastall gravity”, TMF, 208:3 (2021), 522–543; Theoret. and Math. Phys., 208:3 (2021), 1299–1316
This publication is cited in the following 8 articles:
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M.I. Wanas, Samah A. Ammar, Mona M. Foda, “Structure of compact stars: A pure geometric approach”, New Astronomy, 109 (2024), 102201
Hira Sohail, Allah Ditta, Irfan Mahmood, S. K. Maurya, Yousef Mohammed Alanazi, “Rastall teleparallel gravity: gravitational decoupling with MGD approach”, Eur. Phys. J. Plus, 139:8 (2024)
Asifa Ashraf, M. R. Shahzad, Wen-Xiu Ma, “Possible dark energy stars in Rastall gravity”, Int. J. Geom. Methods Mod. Phys., 21:12 (2024)
Krishna Pada Das, Akashdip Karmakar, Ujjal Debnath, “Color flavor locked strange stars in de Rham–Gabadadze–Tolley like massive gravity”, Eur. Phys. J. C, 84:11 (2024)
J. M. Z. Pretel, T. Tangphati, A. Banerjee, “Relativistic structure of charged quark stars in energy–momentum squared gravity”, Annals of Physics, 458 (2023), 169440
A. Banerjee, T. Tangphati, S. Hansraj, A. Pradhan, “Strange quark star models from Rastall gravity”, Annals of Physics, 451 (2023), 169267
R. Saleem, A. Wahab, I. Shahid, “Effectiveness of rastall gravity in modified Chaplygin gas inspired viscous-flation”, Phys. Scr., 97:5 (2022), 055209