发表机构
Inter University Centre for Astronomy and Astrophysics; SETI Institute; Lockheed Martin Solar and Astrophysics Laboratory（大学天文与天体物理中心; SETI研究所; 洛马太阳与天体物理实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用SDO和IRIS观测识别日冕洞羽流底部的19个小尺度喷流，通过Si IV和Mg II谱线分析发现双向流动，表明互换重联是驱动色球和过渡区响应的核心机制。
AI 中文摘要
我们呈现了与色球和过渡区（TR）流动相关的日冕洞羽流底部共空间、共时间小尺度喷流（有时也称为小喷流）的识别。利用太阳动力学观测站（SDO）和界面区域成像光谱仪（IRIS）在2016年3月19日记录的协调观测，我们识别出19个喷流。我们对Si IV 1393.7 Å谱线的分析表明，蓝移大多在10至33 km/s范围内，但少数小于-10 km/s，而共空间Mg II h和k谱线的分析显示蓝移和红移均在-9至17 km/s范围内。在这些事件期间，我们观察到Si IV谱线高度不对称且增强的强度。通过Si IV在过渡区观测到的上流与通过Mg II在色球观测到的下流强相关。我们将这些结果解释为互换重联产生双向流动的特征——在过渡区（色球）产生上流（下流）。
英文摘要
We present the identification of the co-spatial and co-temporal small scale jets -- sometimes also named as jetlets -- at the base of the coronal hole plume associated with chromospheric and transition region (TR) flows. We identified 19 jets with coordinated observations recorded on March 19, 2016 using the Solar Dynamics Observatory (SDO) and the Interface Region Imaging Spectrograph (IRIS). Our analysis of \ion{Si}{4} 1393.7~Å line suggests blueshifts mostly in the range of 10 to 33~km~s$^{-1}$, but few less than -10~km~s$^{-1}$, while analysis of co-spatial \ion{Mg}{2}~h~\&~k lines show both blueshifts and redshifts in the range of {--}9 to 17~km~s$^{-1}$. We observed highly asymmetric, enhanced intensity in \ion{Si}{4} line during these events. The upflows observed in transition region through \ion{Si}{4} is strongly correlated with chromospheric downflows observed in \ion{Mg}{2}. We interpret these results as a signature of interchange reconnections creating bi-directional flows -- giving rise to upflows (downflows) in transition region (chromosphere).
Comments19 pages, 11 figures, 1 table. Accepted for publication in ApJ
