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首页> 外文期刊>The Astrophysical journal >ANALYSIS OF THE TEMPERATURE AND EMISSION MEASURE OF SOLAR CORONAL ARCADES AND TEST OF A SCALING LAW OF FLARE/ARCADE LOOP LENGTH
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ANALYSIS OF THE TEMPERATURE AND EMISSION MEASURE OF SOLAR CORONAL ARCADES AND TEST OF A SCALING LAW OF FLARE/ARCADE LOOP LENGTH

机译：太阳冠状拱室的温度和辐射测量分析及火炬/弧圈长度尺度定律的测试

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摘要

We analyze 17 arcades to study the relations between solar flares and arcades. Soft X-ray images taken with Yohkoh's soft X-ray telescope are used to derive T_0, EM_0, and temporal variation of T_(arc) and EM_(arc), where T_(arc) and T_0 are the temperatures of an arcade and prearcade region and EM_(arc) and EM_0 are the volume emission measures of an arcade and prearcade region. It is found that T_0 ～ 2 MK and T_(arc) ～ 4 MK. We also estimate prearcade coronal electron density n_0 and arcade electron density n_(arc) to find that n_(arc) is comparable to n_0 (n_(arc) ～ n_0 ～ 10~8cm~(-3)). Using these observed EM, T, and n_0, we calculate the theoretical loop length L_(theor) based on the scaling law for solar and stellar flares derived by Shibata & Yokoyama and compare it with observed flare/arcade loop length L_(obs). The result shows a good correlation between them (L_(theor) ～ L_(obs)) and indicates the need of plasma β for the scaling law (L_(theor) ∝ EM~(3/5)T~(-8/5)n_0~(-2/5)β~(-6/5)). This supports the theory of the scaling law and is indirect evidence that flares and arcades are heated by the same magnetic reconnection mechanism.
机译：我们分析了17个拱廊，以研究太阳耀斑与拱廊之间的关系。使用Yohkoh的软X射线望远镜拍摄的软X射线图像得出T_0，EM_0以及T_（arc）和EM_（arc）的时间变化，其中T_（arc）和T_0是拱廊和前拱廊的温度区域和EM_（arc）和EM_0是拱廊和赛前区域的体积排放量度。发现T_0〜2 MK和T_（arc）〜4 MK。我们还估计了前期冠状电子密度n_0和拱形电子密度n_（arc），发现n_（arc）可与n_0相媲美（n_（arc）〜n_0〜10〜8cm〜（-3））。使用这些观测到的EM，T和n_0，我们基于Shibata和Yokoyama推算的太阳耀斑和恒星耀斑的定标律，计算理论环长L_（theor），并将其与观测到的耀斑/拱廊环长L_（obs）进行比较。结果表明它们之间具有良好的相关性（L_（theor）〜L_（obs）），并指出了比例定律需要血浆β（L_（theor）∝ EM〜（3/5）T〜（-8/5） ）n_0〜（-2/5）β〜（-6/5））。这支持了定标定律的理论，并且间接证明了火炬和拱廊是由相同的磁重联机制加热的。

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