论文标题
HI-C 2.1重新连接纳米夹的观察结果
Hi-C 2.1 Observations of Reconnection Nanojets
论文作者
论文摘要
加热太阳气氛的可能机制之一是在不同的时空尺度上发生的磁重新连接。由于冠状环重新连接而引起的快速爆发纳米夹的发现已与纳米插曲有关，并认为是冠状加热的可能机制。过去观察到这些喷气机的发生大多是向向内向向内的方向。在这项研究中，我们报告了十个重新连接纳米夹，四个向内方向向内，而6个向外移动到循环，在高分辨率冠状成像器2.1（HI-C 2.1）（HI-C 2.1）和大气成像组件（AIA）在板上太阳能动力学观测值（SDO）中。我们确定了这些喷气机的最大长度，尖顶宽度，速度和寿命，并研究了它们的相关性。我们发现，具有较高速度的向外移动喷气机的长度和持续时间更长，而向内移动的喷气机显示相反的行为。向外喷气机的平均持续时间为$ \ $ \ $ 42 s，向内喷射为$ \ $ \ $ 24。我们确定了以下100 km S $^{ - 1} $的亚音速速度的喷气机，以超过150 km S $^{ - 1} $的高速。可以在从上过渡区域延伸到电晕的多个AIA的宽带中识别这些喷气机，以表明它们的多热性质。
One of the possible mechanisms for heating the solar atmosphere is the magnetic reconnection occurring at different spatio-temporal scales. The discovery of fast bursty nanojets due to reconnection in the coronal loops has been linked to nanoflares and considered as possible mechanism for coronal heating. The occurrence of these jets mostly in the direction inwards to the loop were observed in the past. In this study, we report ten reconnection nanojets, four with directions inward while six moving outward to the loop, in observations from High-resolution Coronal Imager 2.1 (Hi-C 2.1) and Atmospheric Imaging Assembly (AIA) onboard Solar Dynamics Observatory (SDO). We determined the maximum length, spire width, speed, and lifetimes of these jets and studied their correlations. We found that outward moving jets with higher speeds are longer in length and duration while the inward moving jets show opposite behaviour. Average duration of the outward jets is $\approx$42 s and inwards jets is $\approx$24s. We identified jets with subsonic speeds below 100 km s$^{-1}$ to high-speed over 150 km s$^{-1}$. These jets can be identified in multiple passbands of AIA extending from upper transition region to the corona suggesting their multi-thermal nature.
