论文标题
Insight-HXMT看到的GRS 1915+105中的磁盘风
The disk wind in GRS 1915+105 as seen by Insight-HXMT
论文作者
论文摘要
当源处于频谱柔软状态时，我们通过Insight-HXMT分析了2017年GRS 1915+105的三个观察结果。我们发现高度离子铁的强吸收线，这是由于磁盘风流以$ \ sim $ 1000 km s $ s $^{ - 1} $沿我们的视线吸收。三个观察结果中有两个在其光曲线中显示出较大的振幅振荡，并且变化模式对应于GRS 1915+105的状态$κ$。从时间平均和通量分辨分析中，我们发现磁盘风的电离状态的变化遵循数百秒至几个月的X射线连续体。磁盘风的径向位置与热驾驶一致。由于风的流量而引起的质量损失率与内磁盘中的质量积聚率相当，这证明了磁盘风在磁盘吸积系统中的重要作用。
We analyze three observations of GRS 1915+105 in 2017 by Insight-HXMT when the source was in a spectrally soft state. We find strong absorption lines from highly ionized iron, which are due to absorption by disk wind outflowing at a velocity of $\sim$ 1000 km s$^{-1}$ along our line of sight. Two of the three observations show large amplitude oscillation in their light curves and the variation pattern corresponds to state $κ$ of GRS 1915+105. From time-averaged and flux-resolved analysis, we find that the variation of the ionization state of the disk wind follows the X-ray continuum on timescales from hundreds seconds to months. The radial location of the disk wind is consistent with thermal driving. The mass-loss rate due to the outflowing wind is comparable to the mass accretion rate in the inner disk, which demonstrates the important role of the disk wind in the disk accretion system.
