论文标题
GW170817/grb170817a的晚期余辉：较大的视角和哈勃常数转移到与局部测量更一致的值
The late afterglow of GW170817/GRB170817A: a large viewing angle and the shift of the Hubble constant to a value more consistent with the local measurements
论文作者
论文摘要
中子星合并事件的多理解剂数据有望限制哈勃常数。到目前为止，GW170817仍然是具有多波长电磁对应物的独特重力事件。特别是，在过去的$ \ sim 3-5 $年中，它的收音机和X射线排放量已经测量。在这项工作中，我们适合GW170817/grb 170817a的持久X射线，光学和无线电余潮曲线，包括来自降低相对论GRB流出的正向冲击辐射，减速性GRB流出和次级偏移性的KilOnova流出（尽管第二个组成部分仍然有效），并且是否有任何相关的视图，以及5个相关的观点（是否均为$），并且发现了一个相关的观点（$），并且发现了一个不存在的（$）。 \ rm rad $）。在重力波数据分析中，这种观察角已被视为先验，并且观看角度和光度距离之间的堕落性被打破。最后，我们有一个哈勃常数$ h_0 = 72.57^{+4.09} _ { - 4.17} \，\ rm km \，s^{ - 1} \，mpc^{ - 1} $，这与其他本地测量结果更加一致。如果从未来中子星级合并事件的多通间数据中推断出相似的值，它将为哈勃张力的存在提供关键的支持。
The multi-messenger data of neutron star merger events are promising for constraining the Hubble constant. So far, GW170817 is still the unique gravitational wave event with multi-wavelength electromagnetic counterparts. In particular, its radio and X-ray emission have been measured in the past $\sim 3-5$ years. In this work, we fit the long-lasting X-ray, optical, and radio afterglow light curves of GW170817/GRB 170817A, including the forward shock radiation from both the decelerating relativistic GRB outflow and the sub-relativistic kilonova outflow (though whether the second component contributes significantly is still uncertain), and find out a relatively large viewing angle ($\sim 0.5\, \rm rad$). Such a viewing angle has been taken as a prior in the gravitational wave data analysis, and the degeneracy between the viewing angle and the luminosity distance is broken. Finally, we have a Hubble constant $H_0=72.57^{+4.09}_{-4.17}\, \rm km\, s^{-1}\, Mpc^{-1}$, which is more consistent with that obtained by other local measurements. If rather similar values are inferred from multi-messenger data of future neutron star merger events, it will provide critical support to the existence of the Hubble tension.
