标题： CH Cygni I：盘-喷流连接的观测证据 显示英文标题

标题： CH Cygni I: Observational Evidence for a Disk-Jet Connection

摘要： 我们研究了吸积在共生星CH Cygni产生喷流中的作用。假设CH Cygni中快速随机光学变化来自吸积盘（如同爆发型联星系统），我们利用这种闪烁的变化来诊断1997年盘的状态。当时，CH Cyg下降到非常低的光学状态，Karovska等人报告说产生了无线电喷流。在喷流产生的大约一年内，最快变化（时间尺度为几分钟）的振幅显著减小，尽管仍然存在平滑的小时级时间尺度变化。这种光变曲线的演化表明，与质量抛射事件相关联，内盘可能被破坏，或者该区域的发射受到抑制。我们描述了支持这一闪烁变化解释的光学光谱。同时发生的态变化、喷流抛射和盘破坏提示我们将CH Cygni与一些黑洞候选X射线双星进行比较，这些双星在宽时间尺度上显示出内盘半径的变化以及离散抛射事件（例如微类星体GRS 1915+105和XTE J1550-564）。 显示英文摘要

摘要： We investigate the role of accretion in the production of jets in the symbiotic star CH Cygni. Assuming that the rapid stochastic optical variations in CH Cygni come from the accretion disk, as in cataclysmic variables, we use changes in this flickering to diagnose the state of the disk in 1997. At that time, CH Cyg dropped to a very low optical state, and Karovska et al. report that a radio jet was produced. For approximately one year after the jet production, the amplitude of the fastest (time scales of minutes) variations was significantly reduced, although smooth, hour-time-scale variations were still present. This light curve evolution indicates that the inner disk may have been disrupted, or emission from this region suppressed, in association with the mass-ejection event. We describe optical spectra which support this interpretation of the flickering changes. The simultaneous state change, jet ejection, and disk disruption suggests a comparison between CH Cygni and some black-hole-candidate X-ray binaries that show changes in the inner disk radius in conjunction with discrete ejection events on a wide range of time scales (e.g., the microquasar GRS 1915+105 and XTE J1550-564).