论文标题
持续的无线电射流耦合到柔软的CYG X-1的硬X射线
The persistent radio jet coupled to hard X-rays in the soft state of Cyg X-1
论文作者
论文摘要
我们研究CYG X-1中的长期无线电/X射线相关性。我们发现紧凑型无线电喷射的持续存在。这代表了黑洞二进制的一种新现象，除了在中间状态的坚硬状态和弹道斑点的情节弹出外。尽管硬状态下的无线电发射与柔软的X射线和硬X射线密切相关，但软状态的无线电通量与软X射线中的主要磁盘黑体的通量并不直接相关，而是滞后于大约一百天。我们将滞后解释为发生在供体通过积聚磁盘的磁通量对流过程中。另一方面，软状态无线电通量与硬X射线，15--50 keV，无可测量滞后和相同RMS的强度密切相关。这意味着X射线发射磁盘电晕和软状态喷气机是由相同过程提供动力的，这可能是磁性的。
We study long-term radio/X-ray correlations in Cyg X-1. We find the persistent existence of a compact radio jet in its soft state. This represents a new phenomenon in black-hole binaries, in addition to compact jets in the hard state and episodic ejections of ballistic blobs in the intermediate state. While the radio emission in the hard state is strongly correlated with both the soft and hard X-rays, the radio flux in the soft state is not directly correlated with the flux of the dominant disk blackbody in soft X-rays, but instead it is lagged by about a hundred days. We interpret the lag as occurring in the process of advection of the magnetic flux from the donor through the accretion disk. On the other hand, the soft-state radio flux is very tightly correlated with the hard X-ray, 15--50 keV, flux without a measurable lag and at the same rms. This implies that the X-ray emitting disk corona and the soft-state jet are powered by the same process, probably magnetically.
