论文标题
过渡区网络喷气机的光谱观察
Spectroscopic observation of a transition region network jet
论文作者
论文摘要
无处不在的过渡区（TR）网络喷气机被认为是电晕和太阳风的质量和能量的实质性来源。我们对网络喷气机进行了案例研究，以更好地了解质量流的长度和发射中涉及的能量学的性质。我们提出了带有界面区域成像光谱仪（IRIS）的射流的观察结果，同时还使用太阳能天文台（SDO）的数据提供了进一步的背景。该喷气机位于圆盘中心附近的冠状孔中。我们发现，TR发射的蓝光二级成分与射流有关，并且沿尖刺持续存在。该组件的向上速度约为20-70 km s $^{ - 1} $，并显示增强的线扩展。但是，与喷气机相关的等离子体在上染色体中显示出5-10 km s $^{ - 1} $的下花。最后，射流从看似单极的磁脚上散发出来。尽管对于此事件而言，确定的磁性驱动器无法辨别，但我们推断驱动网络喷射的能量沉积在色球球的顶部，这表明TR网络喷气机是从太阳的大气中驱动的。与线扩展相关的能量通量表明射流可以一直驱动到太阳风中。
Ubiquitous transition region (TR) network jets are considered to be substantial sources of mass and energy to the corona and solar wind. We conduct a case study of a network jet to better understand the nature of mass flows along its length and the energetics involved in its launch. We present an observation of a jet with the Interface Region Imaging Spectrograph (IRIS), while also using data from the Solar Dynamics Observatory (SDO) to provide further context. The jet was located within a coronal hole close to the disk center. We find that a blueshifted secondary component of TR emission is associated with the jet and is persistent along its spire. This component exhibits upward speeds of approximately 20-70 km s$^{-1}$ and shows enhanced line broadening. However, plasma associated with the jet in the upper chromosphere shows downflows of 5-10 km s$^{-1}$. Finally, the jet emanates from a seemingly unipolar magnetic footpoint. While a definitive magnetic driver is not discernible for this event, we infer that the energy driving the network jet is deposited at the top of the chromosphere, indicating that TR network jets are driven from the mid-atmospheric layers of the Sun. The energy flux associated with the line broadening indicates that the jet could be powered all the way into the solar wind.
