Title: Microflare Activity driven by Forced Magnetic Reconnection Show Chinese title

Title: 由强制磁重联驱动的微耀斑活动

Abstract: High cadence, multiwavelength, optical observations of a solar active region are presented, obtained with the Swedish Solar Telescope. Two magnetic bright points are seen to separate in opposite directions at a constant velocity of 2.8km/s. After a separation distance of approximately 4400km is reached, multiple Ellerman bombs are observed in both H-alpha and Ca-K images. As a result of the Ellerman bombs, periodic velocity perturbations in the vicinity of the magnetic neutral line, derived from simultaneous MDI data, are generated with amplitude +/- 6km/s and wavelength 1000km. The velocity oscillations are followed by an impulsive brightening visible in H-alpha and Ca-K, with a peak intensity enhancement of 63%. We interpret these velocity perturbations as the magnetic field deformation necessary to trigger forced reconnection. A time delay of approximately 3min between the H-alpha wing and Ca-K observations indicate that the observed magnetic reconnection occurs at a height of 200km above the solar surface. These observations are consistent with theoretical predictions and provide the first observational evidence of microflare activity driven by forced magnetic reconnection. Show Chinese abstract

Abstract: 高时间分辨率、多波长的太阳活动区光学观测结果被呈现，这些观测是使用瑞典太阳望远镜获得的。 两个磁性亮点以2.8公里/秒的恒定速度朝相反方向分离。 达到大约4400公里的分离距离后，在H-α和Ca-K图像中观察到多个Ellerman炸弹。 由于Ellerman炸弹，在磁性中性线附近产生的速度扰动，来源于同时的MDI数据，振幅为±6公里/秒，波长为1000公里。 速度振荡之后出现一个在H-α和Ca-K中可见的脉冲明亮现象，峰值强度增强了63%。 我们将这些速度扰动解释为触发强制重联所需的磁场变形。 H-α翼和Ca-K观测之间大约3分钟的时间延迟表明，观测到的磁重联发生在太阳表面以上200公里的高度。 这些观测结果与理论预测一致，并提供了由强制磁重联驱动的微耀斑活动的第一个观测证据。