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arXiv 1402.0035astro-ph.HE
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相对论性恒星结构逆问题

The Relativistic Inverse Stellar Structure Problem

Lee Lindblom

摘要:

相对论性恒星(其状态方程是已知的)的可观测宏观性质可以通过求解爱因斯坦方程得出的恒星结构方程来预测。然而对于中子星,我们对状态方程的了解很少,因此如果不以某种方式对状态方程的最高密度部分进行建模,直接的恒星结构问题就不能得到解决。这次演讲将描述最近的工作,发展一个模型独立的方法来确定高密度中子星状态方程,通过解决恒星结构逆问题。这种方法利用了爱因斯坦方程提供了状态方程和由该材料组成的恒星的宏观观测值之间的确定性关系。这个演讲说明了这种方法将如何能够确定的中子星状态方程的高密度部分与百分之几的准确性时,只有两个或三个中子星的质量和半径的高质量测量变得可用。这个演讲还将表明,这种方法可以用于测量其他宏观观测,如质量和潮汐变形,这可以(原则上)测量的引力波观测的双中子星合并。

英文摘要:

The observable macroscopic properties of relativistic stars (whose equations of state are known) can be predicted by solving the stellar structure equations that follow from Einstein's equation. For neutron stars, however, our knowledge of the equation of state is poor, so the direct stellar structure problem can not be solved without modeling the highest density part of the equation of state in some way. This talk will describe recent work on developing a model independent approach to determining the high-density neutron-star equation of state by solving an inverse stellar structure problem. This method uses the fact that Einstein's equation provides a deterministic relationship between the equation of state and the macroscopic observables of the stars which are composed of that material. This talk illustrates how this method will be able to determine the high-density part of the neutron-star equation of state with few percent accuracy when high quality measurements of the masses and radii of just two or three neutron stars become available. This talk will also show that this method can be used with measurements of other macroscopic observables, like the masses and tidal deformabilities, which can (in principle) be measured by gravitational wave observations of binary neutron-star mergers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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