论文标题
小型磁性辫子的太阳冠加热
Solar coronal heating from small-scale magnetic braids
论文作者
论文摘要
通过重新连接的编织冠状磁场松弛被认为是活跃区域冠状环中加热血浆的能量来源。然而，观察与磁性编织物无障碍有关的活动区域冠状加热仍然很少。这种匮乏的原因之一可能是缺乏具有足够高的空间和时间分辨率的冠状观测来捕获这一过程。使用具有高空间分辨率的新观测值（太阳上的250-270 km）和从极端太阳轨道上的极紫外成像仪（EUI）的高节奏（3-10 s），我们观察到不同活性区域中小规模的冠状辫子毫无障碍。无障碍与这些编织环中气体的冲动加热有关。我们评估上覆盖着冷却器色层丝状结构的冠状磁编织可能更常见。此外，我们的观察结果表明，在磁性编织物松弛过程中，空间相干和间歇性的冠状加热的特征。我们的研究揭示了太阳电晕中磁性重新连接的柔和和冲动模式的运行。
Relaxation of braided coronal magnetic fields through reconnection is thought to be a source of energy to heat plasma in active region coronal loops. However, observations of active region coronal heating associated with an untangling of magnetic braids remain sparse. One reason for this paucity could be the lack of coronal observations with a sufficiently high spatial and temporal resolution to capture this process in action. Using new observations with high spatial resolution (250-270 km on the Sun) and high cadence (3-10 s) from the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter, we observed the untangling of small-scale coronal braids in different active regions. The untangling is associated with impulsive heating of the gas in these braided loops. We assess that coronal magnetic braids overlying cooler chromospheric filamentary structures are perhaps more common. Furthermore, our observations show signatures of spatially coherent and intermittent coronal heating during the relaxation of the magnetic braids. Our study reveals the operation of gentle and impulsive modes of magnetic reconnection in the solar corona.
