ION TEMPERATURE AND NON-THERMAL VELOCITY IN A SOLAR ACTIVE REGION: USING EMISSION LINES OF DIFFERENT ATOMIC SPECIES
ION TEMPERATURE AND NON-THERMAL VELOCITY IN A SOLAR ACTIVE REGION: USING EMISSION LINES OF DIFFERENT ATOMIC SPECIES
复制标题
DOI：
10.1088/0004-637x/705/2/l208
复制
发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
S. Imada;H. Hara;T. Watanabe
中科院分区：
文献类型：
--
作者：
S. Imada;H. Hara;T. Watanabe
本文研究了日本之星上的EUV成像光谱仪观测到的活跃区内的离子热温度和非热速度特征。我们用两条不同原子种类的发射线（Fe xvi 262.98 Å和S xiii 256.69 Å）来区分离子热速度和观测到的半最大值全宽。我们假设这两条发射线的源具有相同的热温度。我们也假设它们有相同的非热速度。根据这些假设，我们可以得到离子热温度，注意到m硫~ 0.6Miron。我们在光子计数充足的活跃区（>4500）进行了离子热温度分析。结果表明：(1)fexvi和sxiii获得的共同离子热温度为~ 2.5 MK,(2)典型的非热速度为~ 13 km S−1，(3)最高的非热速度（bbb20 km S−1）优先出现在fexvi的亮点之间，而(4)与最高的非热速度区相比，最热的物质（bbb3mk）相对出现在亮点内部。
We have studied the characteristics of the ion thermal temperature and non-thermal velocity in an active region observed by the EUV Imaging Spectrometer onboard Hinode. We used two emission lines of different atomic species (Fe xvi 262.98 Å and S xiii 256.69 Å) to distinguish the ion thermal velocity from the observed full width at half-maximum. We assumed that the sources of the two emission lines are the same thermal temperature. We also assumed that they have the same non-thermal velocity. With these assumptions, we could obtain the ion thermal temperature, after noting that Msulfur ∼ 0.6Miron. We have carried out the ion thermal temperature analysis in the active region where the photon counts are sufficient (>4500). What we found is as follows: (1) the common ion thermal temperatures obtained by Fe xvi and S xiii are ∼2.5 MK, (2) the typical non-thermal velocities are ∼13 km s−1, (3) the highest non-thermal velocities (>20 km s−1) are preferentially observed between the bright points in Fe xvi, while (4) the hottest material (>3 MK) is observed relatively inside the bright points compared with the highest non-thermal velocity region.