巨色球海葵喷流的Hinode观测及其与磁流体动力学模拟的比较：Alfven波和磁重联振荡的证据
Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
摘要：
2007年2月9日，日之出在太阳边缘发现了一个美丽的巨大喷流，其中有冷的和热的成分。日出SOT、XRT和TRACE 195卫星的同时观测表明，热喷流（5 × 10^6 K）和冷喷流（10^4 K）并排存在，热喷流先于相关的冷喷流（1-2分钟）。在光学（Ca IIH），EUV（195 A）和软X射线发射中观察到电流片状结构，表明磁重联发生在过渡区或上部色球层。还用Hinode SOT观察到Alfven波。这些沿着射流传播的速度为200公里/秒，振幅（横向速度）为5-15公里/秒，周期为200秒。我们进行了二维MHD模拟射流新兴的通量重联模型的基础上，通过扩展Yokoyama和柴田的模型。我们用更现实的初始条件（10^6 K日冕）扩展了模型，并将我们的模型与多波长观测进行了比较。模拟模型中日冕温度和密度的改善首次允许定量再现冷喷流和热喷流的结构和演化，支持磁重联模型。Alfven波的产生和传播也自洽地再现在模拟模型中。
英文摘要：
Hinode discovered a beautiful giant jet with both cool and hot components at the solar limb on 2007 February 9. Simultaneous observations by the Hinode SOT, XRT, and TRACE 195 satellites revealed that hot (5x10^6 K) and cool (10^4 K) jets were located side by side and that the hot jet preceded the associated cool jet (1-2 minutes). A current-sheet-like structure was seen in optical (Ca IIH), EUV (195A), and soft X-ray emissions, suggesting that magnetic reconnection is occurring in the transition region or upper chromosphere. Alfven waves were also observed with Hinode SOT. These propagated along the jet at velocities of 200 km/s with amplitudes (transverse velocity) of 5-15 km/s and a period of 200 s. We performed two-dimensional MHD simulation of the jets on the basis of the emerging flux-reconnection model, by extending Yokoyama and Shibata's model. We extended the model with a more realistic initial condition (10^6 K corona) and compared our model with multiwavelength observations. The improvement of the coronal temperature and density in the simulation model allowed for the first time the reproduction of the structure and evolution of both the cool and hot jets quantitatively, supporting the magnetic reconnection model. The generation and the propagation of Alfven waves are also reproduced self-consistently in the simulation model.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
