标题： 具有MIT袋状态方程的各向异性致密星的研究 f(R,T) 修改理论 显示英文标题

标题： A study of anisotropic compact star with MIT bag EoS in f(R,T) modified theory

摘要： 在目前的研究中，我们以修改后的 f(R,T) 引力理论为背景，研究了一种具有各向异性奇异星的特定模型，特别是 Her X-1 模型。我们选择 f(R,T) = R + 2{\xi }T，其中 R 是里奇标量，T 是能量-动量张量的迹，{\xi }是耦合常数。 为了得到修正场方程的解，我们将 Buchdahl 度规应用于我们的方程。 我们考虑了物质由 MIT 袋子模型状态方程控制的情况，即 Pr = 1/3({\rho }- 4B)，其中 B 是袋子常数。 我们利用史瓦西内部时空计算未知参数的值，随后选择参数{\xi }、K、{\beta }的适当值，并为不同的{\xi }列出不同袋常数值。 我们通过进行能量条件、力平衡、绝热指数、红移等测试来检验我们模型的物理有效性。 观测结果显示，所提出的 f(R,T) 模型满足所有这些测试且相当可接受。 显示英文摘要

摘要： In the current study, we investigated a specific model of anisotropic strange stars specially Her X-1, in the background of modified f(R,T) gravity by choosing f(R,T) = R+2{\xi}T, where R is Ricci scalar, T is the trace of the energy-momentum tensor and {\xi} is a coupling constant. To obtained the solution for the modified field equations, we apply Buchdahl metric to our equations. We consider the case, when the matter is governed by MIT bag model equation of state as Pr =1/3({\rho} -4B), where B is bag constant. We calculate the values of unknown parameters using Schwarzschild interior space-time followed by choosing the appropriate values of parameter {\xi} , K, {\beta} and also tabulated different values of bag constant for different {\xi} . We examine the physical validity of our model by performing tests such as energy conditions, equilibrium of the forces, the adiabatic index, redshift and some more. The observational results showed that the proposed f(R,T) model satisfies all these tests and are quite acceptable.