论文标题
光球垂直电流与太阳耀斑中的硬X射线源之间的关系：统计研究
Relationships between Photospheric Vertical Electric Currents and Hard X-Ray Sources in Solar Flares: Statistical Study
论文作者
论文摘要
仍然存在争论，是否由于沿磁性回路流动的电流中断而可能发生太阳耀斑的颗粒加速度。为了解决这个问题，我们对\ textit {ramaty高能量太阳能传播成像}（RAMATY高能量图像器}（RHESSI）（rhessi）（rhessi）和Photospheric垂直电流（PVECS，$ J_ {R} $ gertocription conmaints conminction contraction contection，我们进行了第一个统计研究。 Imager（HMI）在板载\ textIt {太阳动力学天文台}（SDO）。分析了2010年 - 2015年两种仪器在太阳能磁盘中心观察到的48个耀斑的样本，从C3.0到X3.1类。我们发现，$ \ \ \ \％的所有HXR源中的大约70 $ \％与增强的岛屿或丝带重叠（$ \ weft | j_ {r} \ right | \ right | \ gtrsim 10^{4} $ statampere〜cm $^cm $^{ - 2} $）pvecs pvecs。但是，与PVEC Maxima重叠的HXR源的少于$ \ \％，精度为$ \ pm 3^{\ prime \ prime} $。超过一半的耀斑，在增强的PVEC区域外有HXR来源。我们发现HXR源的强度与下面的PVEC密度或总PVEC之间没有相关性。在耀斑期间，在HXR来源下未发现PVEC的系统耗散。总体而言，结果不支持电流式耀斑模型。但是，结果表明耀斑区域纵向电流的存在的重要性。了解它们在能量释放，血浆加热和颗粒加速的过程中的特定作用需要进一步研究。
There are still debates whether particle acceleration in solar flares may occur due to interruption of electric currents flowing along magnetic loops. To contribute to this problem, we performed the first statistical study of relationships between flare hard X-ray (HXR; $50-100$ keV) sources observed by the \textit{Ramaty High-Energy Solar Spectroscopic Imager} (RHESSI) and photospheric vertical electric currents (PVECs, $j_{r}$) calculated using vector magnetograms obtained with the Helioseismic and Magnetic Imager (HMI) on-board the \textit{Solar Dynamics Observatory} (SDO). A sample of 48 flares, from C3.0 to X3.1 class, observed in central part of the solar disk by both instruments in 2010--2015 was analyzed. We found that $\approx 70$\% of all HXR sources overlapped with islands or ribbons of enhanced ($\left| j_{r} \right| \gtrsim 10^{4}$ statampere~cm$^{-2}$) PVECs. However, less than $\approx 40$\% of the HXR sources overlapped with PVEC maxima, with an accuracy of $\pm 3^{\prime\prime}$. More than in half of the flares there were HXR sources outside regions of enhanced PVECs. We found no correlation between intensity of the HXR sources and PVEC density or total PVEC under them. No systematic dissipation of PVECs under the HXR sources was found during the flares. Collectively, the results do not support the current-interruption flare models. However, the results indicate the importance of the presence of longitudinal currents in flare regions. Understanding of their specific role in the processes of energy release, plasma heating, and acceleration of particles requires further investigation.
