论文标题
耀斑准周期性脉动与复发喷气机相关
Flare Quasi-Periodic Pulsation Associated with Recurrent Jets
论文作者
论文摘要
在太阳能/恒星耀斑的光曲线中经常观察到耀斑排放的时间特征和等离子体特征的准周期搏动（QPP）。 In this paper, we investigated non-stationary QPPs associated with recurrent jets during an M1.2 flare on 2022 July 14. A quasi-period of about 45$\pm$10 s, determined by the wavelet transform technique, is simultaneously identified at wavelengths of soft/hard X-ray and microwave emissions, which are recorded by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor，Fermi和Nobeyama无线电极化器分别。在大气成像组件（AIA）图像系列中发现了一组间歇性节奏约为45 $ \ pm $ 10 s的循环喷气机，但比Flare QPP早180-S。所有观察性事实都表明，复发喷气机可以激发耀斑QPP，它们应与非热电子相关，这些电子被重复释放过程（例如重复的磁重新连接）会定期加速。此外，在AIA94Å中的热耀斑环连接的双脚步处发现了相同的准阶段，并测量相位速度为1420 km/s。基于差分发射度量，估计在环顶和脚上的平均温度，数量密度和磁场强度分别为7.7/6.7 mk，7.5/3.6*10 ^{10} cm ^{ - 3}和143/99 g。我们的测量结果表明，45-S QPP可能是由耀斑环的扭结模式波调节的。
Quasi-periodic pulsations (QPPs), which carry time features and plasma characteristics of flare emissions, are frequently observed in light curves of solar/stellar flares. In this paper, we investigated non-stationary QPPs associated with recurrent jets during an M1.2 flare on 2022 July 14. A quasi-period of about 45$\pm$10 s, determined by the wavelet transform technique, is simultaneously identified at wavelengths of soft/hard X-ray and microwave emissions, which are recorded by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor, Fermi, and the Nobeyama Radio Polarimeters, respectively. A group of recurrent jets with an intermittent cadence of about 45$\pm$10 s are found in Atmospheric Imaging Assembly (AIA) image series at 304 Å, but they are 180-s earlier than the flare QPP. All observational facts suggest that the flare QPP could be excited by recurrent jets, and they should be associated with nonthermal electrons that are periodically accelerated by a repeated energy release process, like repetitive magnetic reconnection. Moreover, the same quasi-period is discovered at double footpoints connected by a hot flare loop in AIA 94 Å, and the phase speed is measured to 1420 km/s. Based on the differential emission measure, the average temperatures, number densities, and magnetic field strengths at the loop top and footpoint are estimated to 7.7/6.7 MK, 7.5/3.6*10^{10} cm ^{-3}, and 143/99 G, respectively. Our measurements indicate that the 45-s QPP is probably modulated by the kink-mode wave of the flare loop.
