暗物质对不同夸克模型描述的奇异夸克星的影响
Impact of dark matter on strange quark stars described by different quark models
AI总结：
该研究假设暗物质仅通过引力与普通物质相互作用，将掺有暗物质的奇异夸克星视为双流体系统，对比准粒子模型和扩展MIT袋模型描述的夸克物质，用双流体TOV方程求解恒星性质，发现暗物质对奇异夸克星性质的影响模式或不受夸克物质状态方程影响。
摘要：
暗物质被假设仅通过引力与普通物质相互作用，且可能存在于奇异夸克星等致密天体中。我们将掺有暗物质的奇异夸克星视为双流体系统，以研究暗物质对奇异夸克星的潜在影响。为进行比较，夸克物质采用准粒子模型和扩展MIT袋模型描述。暗物质被视为不对称、自相互作用且由大质量费米子组成。我们使用双流体托尔曼-奥本海默-沃尔科夫（TOV）方程求解特定恒星性质。分析得到中心能量密度与质量、半径与质量、潮汐形变能力与质量的关系，计算曲线总体与观测数据一致，尤其发现费米子不对称暗物质对奇异夸克星性质的影响模式或不受夸克物质状态方程（EOS）影响。
英文摘要：
Dark matter is hypothesized to interact with ordinary matter solely through gravity and may be present in compact objects such as strange quark stars. We treat strange quark stars admixed with dark matter as two-fluid systems to investigate the potential effects of dark matter on strange quark stars. Quark matter is described by the quasiparticle model and the extended MIT bag model for comparison. Dark matter is treated as asymmetric, self-interacting, and composed of massive fermionic particles. The two-fluid Tolman-Oppenheimer-Volkoff (TOV) equations are employed to solve for specific stellar properties. Our analysis yields relations between central energy density and mass, radius and mass, as well as tidal deformability and mass. The calculated curves generally align with observational data. In particular, we find that the pattern in which fermionic asymmetric dark matter affects the properties of strange quark stars may not be influenced by the equation of state (EOS) of strange quark matter.
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