Multimessenger parameter estimation of GW170817
Multimessenger parameter estimation of GW170817
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DOI：
10.1140/epja/i2019-12716-4
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
D. Radice;L. Dai
中科院分区：
文献类型：
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作者：
D. Radice;L. Dai
我们结合引力波(GW)和电磁(EM)数据对双星中子星(NS)合并GW170817进行了贝叶斯参数估计。EM似然率是从大量的数值相对论模拟中构建的，我们将这些模拟与从EM光曲线建模中推断出的残余物吸积盘质量的下限结合在一起。与以前的工作相比，我们的分析可以更精确地确定双星的潮汐变形性，电磁数据提供了双星的下界，以及双星的质量比，EM数据有利于较小的质量不对称性。发现ANS面积半径的90%可信区间为KM(统计和系统不确定性)。
We combine gravitational wave (GW) and electromagnetic (EM) data to perform a Bayesian parameter estimation of the binary neutron star (NS) merger GW170817. The EM likelihood is constructed from a fit to a large number of numerical relativity simulations which we combine with a lower bound on the mass of the remnant’s accretion disk inferred from the modeling of the EM light curve. In comparison with previous works, our analysis yields a more precise determination of the tidal deformability of the binary, for which the EM data provide a lower bound, and of the mass ratio of the binary, with the EM data favoring a smaller mass asymmetry. The 90% credible interval for the areal radius of aNS is found to bekm (statistical and systematic uncertainties).