论文标题
在太阳耀斑期间在Lyman-Alpha发射中检测到的准周期脉动
Quasi-periodic pulsation detected in Lyman-alpha emission during solar flares
论文作者
论文摘要
我们研究了在两个太阳耀斑期间，即X级（SOL2012-01-27T）和C级（SOL2016-02-08T）中的Lyman-Alpha，X射线和极端粉丝（EUV）排放中的准周期脉动（QPP）。在这些太阳能耀斑期间的全盘Lyman-Alpha和X射线通量由EUV传感器和X射线传感器记录在地理操作环境卫星上。 °是从大气成像组件测量的EUV图像位置的区域。可以将QPP识别为光曲线中的一系列规则和周期性峰，并且其准周期性是由全球小波和傅立叶功率谱确定的。在X级耀斑的冲动阶段检测到大约3分钟的准周期性，可以解释为染色体中的声波（例如，Milligan等人，2017年）。有趣的是，在太阳耀斑的整个进化阶段，包括前体，冲动和渐进阶段，大约发现了大约1分钟的准周期性。这是在太阳耀斑期间，特别是在耀斑前体期间的莱曼 - 阿尔法发射中1分钟QPP的第一份报告。它可以解释为磁重新连接的自振荡状态，例如磁滴。
We investigated the quasi-periodic pulsation (QPP) in Lyman-alpha, X-ray and extreme-ultraviolet (EUV) emissions during two solar flares, i.e., an X-class (SOL2012-01-27T) and a C-class (SOL2016-02-08T). The full-disk Lyman-alpha and X-Ray flux during these solar flares were recorded by the EUV Sensor and X-Ray Sensor on board the Geostationary Operational Environmental Satellite. The °are regions were located from the EUV images measured by the Atmospheric Imaging Assembly. The QPP could be identified as a series of regular and periodic peaks in the light curves, and its quasi-periodicity was determined from the global wavelet and Fourier power spectra. A quasi-periodicity at about 3 minutes is detected during the impulsive phase of the X-class flare, which could be explained as the acoustic wave in the chromosphere (e.g., Milligan et al. 2017). Interestingly, a quasi-periodicity at roughly 1 minute is discovered during the entire evolutionary phases of solar flares, including the precursor, impulsive, and gradual phases. This is the first report of 1-minute QPP in the Lyman-alpha emission during solar flares, in particular during the flare precursor. It may be interpreted as a self-oscillatory regime of the magnetic reconnection, such as magnetic dripping.
