论文标题
冠状冠冕作为恒星冠状质量弹出的代理
Coronal Dimming as a Proxy for Stellar Coronal Mass Ejections
论文作者
论文摘要
在过去的二十年中，已经广泛观察到太阳冠状动脉凹痕，并被认为与冠状质量弹出（CMES）密切相关。最近的研究发现，冠状会变暗是唯一可以区分具有CME的强大ARE与没有的签名的签名。因此，Dimming可能是观察遥远的阳光恒星上恒星CME的最佳候选者之一。在这项研究中，我们研究了使用冠状变性作为诊断恒星CME的代理的可能性。通过模拟现实的太阳能CME事件和使用全局磁性水力动力学模型（AWSOM：Alfven-Wave太阳能模型）的相应冠状变性，我们首先证明了该模型复制太阳能观测的能力。然后，我们通过修改输入磁通密度以及CME通量绳的初始磁能来扩展模拟恒星CME的模型。我们的结果表明，随着仪器灵敏度的提高，可以检测出恒星CME引起的冠状污染信号。
Solar coronal dimmings have been observed extensively in the past two decades and are believed to have close association with coronal mass ejections (CMEs). Recent study found that coronal dimming is the only signature that could differentiate powerful ares that have CMEs from those that do not. Therefore, dimming might be one of the best candidates to observe the stellar CMEs on distant Sun-like stars. In this study, we investigate the possibility of using coronal dimming as a proxy to diagnose stellar CMEs. By simulating a realistic solar CME event and corresponding coronal dimming using a global magnetohydrodynamics model (AWSoM: Alfven-wave Solar Model), we first demonstrate the capability of the model to reproduce solar observations. We then extend the model for simulating stellar CMEs by modifying the input magnetic flux density as well as the initial magnetic energy of the CME flux rope. Our result suggests that with improved instrument sensitivity, it is possible to detect the coronal dimming signals induced by the stellar CMEs.
