标题： 利用质量-半径数据约束引力理论的细微之处 显示英文标题

标题： Subtleties in constraining gravity theories with mass-radius data

摘要： 中子星质量和半径的同时测量可用于限制广义相对论（GR）的偏差，正如最近针对达莫尔和埃索普雷塞提出的自发标量化模型（DEF）所展示的那样。 在这里，我们研究了相同方法在这一单一例子之外的一般适用性。 首先，我们表明，简单地改变DEF模型会使相同的质量-半径测量数据无法用于获得约束条件。 另一方面，在标量-Gauss-Bonnet理论中出现的一种近期流行且不同的标量化模型也可以像原始DEF模型一样受到限制，尽管是由于略微不同的潜在机制。 这些表明，使用质量-半径数据有可能限制各种引力理论，但该方法也存在局限性。 显示英文摘要

摘要： Simultaneous measurements of neutron star masses and radii can be used to constrain deviations from general relativity (GR) as was recently demonstrated for the spontaneous scalarization model of Damour and Esposito-Far\`{e}se (DEF). Here, we investigate the general applicability of the same procedure beyond this single example. We first show that a simple variation of the DEF model renders the same mass-radius measurements ineffective for obtaining constraints. On the other hand, a recently popular and distinct model of scalarization that arises in scalar-Gauss-Bonnet theory can be constrained similarly to the original DEF model, albeit due to a slightly different underlying mechanism. These establish that using the mass-radius data can potentially constrain various theories of gravity, but the method also has limitations.