人马座A*的自旋角动量与黑洞质量分量
The Spin Angular Momentum and Black Hole Mass Components of Sagittarius A*
中文总结 AI 辅助
本文综述Daly等人用外流法结合六组同步X射线与射电数据得到的Sgr A*自旋角动量等结果，验证了其与独立数据集结果的一致性，指出同步测量可提高外流法应用精度。
中文摘要 AI 辅助
Daly等人（2024年）通过将外流法应用于六组同时或同期获取的X射线与射电数据，得到了人马座A*（Sgr A*）的无量纲自旋角动量、无量纲自旋函数及黑洞质量分量。本文综述了采用外流法得到的Sgr A*相关结果，每组数据集均得到一致结果。优选数据集（Set I）显示，Sgr A*的无量纲自旋角动量$a_*=(0.90\tilde{+}0.06)$，无量纲自旋函数$F=(0.62\tilde{+}0.10)$，该结果与2019年Daly将外流法应用于独立数据集得到的$a_*=(0.93\tilde{+}0.15)$一致。对于当前状态下Sgr A*这类弱致密射电源，采用同时或同期的射电与X射线测量可最准确地确定外流法的应用结果。
英文摘要
The dimensionless spin angular momentum, dimensionless spin function, and blackhole mass components of Sagittarius A* (Sgr A*) were obtained by Daly et al. (2024) by applying the outflow method to six independent sets of simultaneously or contemporaneously obtained X-ray and radio data. Here, results obtained for Sgr A* with the outflow method are reviewed. Consistent results were obtained with each data set. Set I (the preferred data set) indicates that Sgr A* has a dimensionless spin angular momentum $a_* = (0.90 ~\pm~ 0.06)$ and a dimensionless spin function $F = (0.62 ~\pm~ 0.10)$. The results are consistent with the value of $a_* = (0.93~\pm~ 0.15)$ obtained with the outflow method applied to an independent data set (Daly 2019). The application of the outflow method to a weak compact radio source such as Sgr A* in its current state is most accurately determined with simultaneous or contemporaneous radio and X-ray measurements.
