论文标题
通过普遍关系来限制修饰的重力中的状态方程
Constraining the equation of state in modified gravity via universal relations
论文作者
论文摘要
现代的多理解剂天文观测和重离子实验为紧凑物体的结构提供了新的见解。然而，当涉及到核饱和密度之上的超密集物质（例如中子恒星中发现的）时，仍然存在许多歧义。这项工作探讨了最大质量点的静态中子星的物理参数之间的状态方程（EOS）无关的普遍关系，以前证明了一般相对论（GR）（GR），并用于在GR框架内限制EOS候选者。我们探索了53个不同的EOS候选者，并证明这些关系对于大规模标量理论中的标量中子恒星持续存在，还探讨了非巴里型EOS的效果。我们进一步表明，关系的拟合参数高度取决于理论的参数。根据这些关系，可以得出对EOS的多个约束，事实证明它们与GR的限制可能显着不同。这证明了即使对EOS施加约束，也要考虑修改后的重力效应的重要性。
Modern multi-messenger astronomical observations and heavy ion experiments provide new insights into the structure of compact objects. Nevertheless, much ambiguity remains when it comes to super dense matter above the nuclear saturation density such as that found within neutron stars. This work explores equation of state (EOS)-independent universal relations between the physical parameters of static neutron stars at the maximum-mass point, previously proven for General Relativity (GR) and used to constraint EOS candidates within the GR framework. We explore 53 different EOS candidates and prove that these relations hold for scalarized neutron stars in massive scalar-tensor theories, exploring also the effect of non-baryonic EOS. We further show that the relation's fit parameters are highly dependent on the theory's parameters. On the basis of these relations multiple constraints on the EOS can be derived and it turns out that they can be significantly different than the GR ones. This demonstrates the importance of taking into account the modified gravity effects even when imposing constraints on the EOS.
