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首页> 外文期刊>The Astrophysical Journal. Letters >Observation of magnetic reconnection driven by granular scale advection
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Observation of magnetic reconnection driven by granular scale advection

机译：颗粒对流驱动的磁重联的观察

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摘要

We report the first evidence of magnetic reconnection driven by advection in a rapidly developing large granule using high spatial resolution observations of a small surge event (base size ～ 4″ × 4″) with the 1.6 m aperture New Solar Telescope at the Big Bear Solar Observatory. The observations were carried out in narrowband (0.5 ?) He I 10830 ? and broadband (10 ?) TiO 7057 ?. Since He I 10830 ? triplet has a very high excitation level and is optically thin, its filtergrams enable us to investigate the surge from the photosphere through the chromosphere into the lower corona. Simultaneous space data from the Atmospheric Imaging Assembly and Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory were used in the analysis. It is shown that the surge is spatio-temporally associated with magnetic flux emergence in the rapidly developing large granule. During the development of the granule, its advecting flow (～2 km s~(-1)) squeezed the magnetic flux into an intergranular lane area, where a magnetic flux concentration was formed and the neighboring flux with opposite magnetic polarity was canceled. During the cancellation, the surge was produced as absorption in He I 10830 ? filtergrams while simultaneous EUV brightening occurred at its base. The observations clearly indicate evidence of a finest-scale reconnection process driven by the granule's motion.
机译：我们使用大熊太阳能公司的1.6 m孔径新型太阳望远镜在一个小浪涌事件（基础尺寸〜4”×4”）的高空间分辨率观测结果中，报告了快速发展的大颗粒中由对流驱动的磁重联的第一个证据。天文台。观察是在窄带（0.5？）He I 10830中进行的。和宽带（10？）TiO 7057？。自从我10830？三重态具有很高的激发能级，并且光学上很薄，它的滤镜使我们能够研究从光球到色球到下日冕的电涌。分析中使用了来自太阳动力学天文台上的大气成像组件以及日震和磁成像仪的同时空间数据。结果表明，在快速发展的大颗粒中，激增与磁通量的出现在时间上是相关的。在颗粒的发展过程中，其正向流动（〜2 km s〜（-1））将磁通量压缩到晶间车道区域，形成了磁通量集中，并且消除了相邻的相反极性的磁通。取消期间，在He I 10830中吸收了电涌。滤光片同时进行EUV增亮在其底部。这些观察清楚地表明了由颗粒运动驱动的最佳规模重新连接过程的证据。

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