Constraining the Neutron Star Mass–Radius Relation and Dense Matter Equation of State with NICER. III. Model Description and Verification of Parameter Estimation Codes
Constraining the Neutron Star Mass–Radius Relation and Dense Matter Equation of State with NICER. III. Model Description and Verification of Parameter Estimation Codes
复制标题
用 NICER 约束中子星质量半径关系和稠密物质状态方程 III。
DOI：
10.3847/2041-8213/abfb79
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
K. Gendreau
中科院分区：
文献类型：
--
作者：
S. Bogdanov;A. Dittmann;W. Ho;F. Lamb;S. Mahmoodifar;M. Miller;S. Morsink;T. E. Riley;T. Strohmayer;A. Watts;Devarshi Choudhury;S. Guillot;A. Harding;P. Ray;Z. Wadiasingh;M. Wolff;C. Markwardt;Z. Arzoumanian;K. Gendreau
我们描述了我们使用的X射线脉冲轮廓模型，以及我们如何使用它们来分析中子星内部成分探测器(NICER)对旋转动力毫秒脉冲星的观测，以获得关于中子星的质量-半径关系和其核心中致密物质的状态方程的信息。在这里，我们详细介绍了我们在Miller等人中分析的PSR J0030+0451的观测轮廓的建模。和Riley等人。并描述了对具有R/M3的恒星的脉冲分布的计算的交叉验证，以防将来的分析需要考虑这种紧凑的恒星。我们还介绍了我们对Miller等人使用的参数估计程序的早期交叉验证工作。和Riley等人。通过分析两个不同的合成数据集。这两个代码都在质量半径平面上产生了可靠的区域，这些区域在统计上彼此一致，并且都给出了模型参数值的后验分布，与用于生成数据的值一致。我们还总结了Miller等人对参数估计过程的附加检验。这使用了合成脉冲分布和PSR J0030+0451更好的脉冲分布。然后，我们通过分析四种不同的合成脉冲轮廓来说明质量和半径估计的精度如何依赖于脉冲星的自转速度和热点的大小。最后，我们评估了使用这种技术进行估计的系统误差的可能来源，其中一些可能值得进一步调查。
We describe the X-ray pulse profile models we use and how we use them to analyze Neutron Star Interior Composition Explorer (NICER) observations of rotation-powered millisecond pulsars to obtain information about the mass–radius relation of neutron stars and the equation of state of the dense matter in their cores. Here we detail our modeling of the observed profile of PSR J0030+0451 that we analyzed in Miller et al. and Riley et al. and describe a cross-verification of computations of the pulse profiles of a star with R/M 3, in case stars this compact need to be considered in future analyses. We also present our early cross-verification efforts of the parameter estimation procedures used by Miller et al. and Riley et al. by analyzing two distinct synthetic data sets. Both codes yielded credible regions in the mass–radius plane that are statistically consistent with one another, and both gave posterior distributions for model parameter values consistent with the values that were used to generate the data. We also summarize the additional tests of the parameter estimation procedure of Miller et al. that used synthetic pulse profiles and the NICER pulse profile of PSR J0030+0451. We then illustrate how the precision of mass and radius estimates depends on the pulsar’s spin rate and the size of its hot spot by analyzing four different synthetic pulse profiles. Finally, we assess possible sources of systematic error in the estimates made using this technique, some of which may warrant further investigation.
X 射线爆发的散裂改变的吸积成分：对点火条件和爆发灰烬的影响
DOI：
10.3847/1538-4357/ab4f71
发表时间：
2019
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Randhawa, J. S.;Meisel, Z.;Giuliani, S. A.;Schatz, H.;Meyer, B. S.;Ebinger, K.;Hood, A. A.;Kanungo, R.
通讯作者：
Kanungo, R.