This study investigated the formation and evolution of a strange star known as SAX.J1808.4–3658 in the Krori–Barua Rainbow spacetime, resulting from the collapse of string fluid. The study examined the dynamical variables derived from the field equations, taking into consideration the influence of the particle’s energy on the mass density, pressure, and string tension. Additionally, various techniques were employed to analyze the physical properties, including gradients, energy conditions, anisotropy, stability, the Tolman–Oppenheimer–Volkoff equation, mass function, compactness, and red-shift. The study’s findings revealed that the strange star SAX.J1808.4–3658 satisfies all the conditions necessary for its evolution from an anisotropic string fluid. This discovery suggests that strange stars might have emerged during the string-oriented quark era of the Universe. The researchers presented all the physical quantities within the frameworks of both rainbow gravity and general relativity, while also utilizing graphical representations to aid in comprehending the study’s findings. The energy conditions and anisotropy were found to be fulfilled, indicating the stability of the strange star. Furthermore, the Tolman–Oppenheimer–Volkoff equation was employed to determine the maximum mass of the strange star, which was found to align with observational data.

这项研究调查了 Krori-Barua 彩虹时空中一颗名为 SAX.J1808.4-3658 的奇怪恒星的形成和演化，该恒星是由弦流体塌缩产生的。该研究检查了从场方程导出的动力学变量，同时考虑了粒子能量对质量密度、压力和弦张力的影响。此外，还采用了各种技术来分析物理特性，包括梯度、能量条件、各向异性、稳定性、托尔曼-奥本海默-沃尔科夫方程、质量函数、紧致性和红移。研究结果表明，奇怪的恒星SAX.J1808.4-3658满足其从各向异性弦流体演化所需的所有条件。这一发现表明，奇怪的恒星可能是在宇宙的弦夸克时代出现的。研究人员在彩虹引力和广义相对论的框架内展示了所有物理量，同时还利用图形表示来帮助理解研究结果。能量条件和各向异性被发现满足，表明奇异星的稳定性。此外，托尔曼-奥本海默-沃尔科夫方程被用来确定这颗奇怪恒星的最大质量，结果发现该方程与观测数据相符。