Reale Fabio, Parenti Susanna, Reeves Kathy K, Weber Mark, Bobra Monica G, Barbera Marco, Kano Ryouhei, Narukage Noriyuki, Shimojo Masumi, Sakao Taro, Peres Giovanni, Golub Leon
Dipartimento di Scienze Fisiche ed Astronomiche, Sezione di Astronomia, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy.
Science. 2007 Dec 7;318(5856):1582-5. doi: 10.1126/science.1146590.
The determination of the fine thermal structure of the solar corona is fundamental to constraining the coronal heating mechanisms. The Hinode X-ray Telescope collected images of the solar corona in different passbands, thus providing temperature diagnostics through energy ratios. By combining different filters to optimize the signal-to-noise ratio, we observed a coronal active region in five filters, revealing a highly thermally structured corona: very fine structures in the core of the region and on a larger scale further away. We observed continuous thermal distribution along the coronal loops, as well as entangled structures, and variations of thermal structuring along the line of sight.
确定日冕精细的热结构对于限制日冕加热机制至关重要。“日之出”X射线望远镜收集了不同通带的日冕图像，从而通过能量比提供温度诊断。通过组合不同滤镜以优化信噪比，我们在五个滤镜下观测了一个日冕活动区，揭示了一个具有高度热结构的日冕：该区域核心处有非常精细的结构，在更远的地方则有更大尺度的结构。我们观测到沿日冕环的连续热分布、缠结结构以及沿视线方向的热结构变化。
