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题名: On the time evolution of brightness, volume and height of a coronal source in an M-class flare
作者: Firoz, Kazi A.; Gan, W. Q.; Li, Y. P.; Rodriguez-Pacheco, J.; Su, Y.
刊名: ASTROPHYSICS AND SPACE SCIENCE
出版日期: 2017
卷号: 362, 期号:6, 页码:aan3211-
英文摘要: We study brightness, volume and heights of the X-ray thermal emission components for an M-class solar flare on 17 May 2012. Based on the RHESSI data availability, we present the results for 01:42-01:58 UT over the lateflare phase. It is observed that the spatial evolution of the thermal emission components 6-12 and 12-18 keV are well associated with the hottest plasma in the corona. Results show that the ascending height (similar to 1.35x10(4) km) and speed (similar to 14.0 kms(-1)) of coronal source component 6-12 keV is slightly smaller than the ascending height (similar to 1.45x10(4) km) and speed (similar to 15.1 kms(-1)) of the coronal source component 12-18 keV. Mean flux intensity (I-mean) of the 6-12 keV maintained a good fit (chi(2) = 0.41) with the corresponding volume (V) following strongly the power law [I-mean = (15.8 +/- 0.21) V-1.28 +/- 0.03]. In contrast, the 12-18 keV maintained a weak fit (chi(2) = 2.37) following still the power law [I-mean = (0.19 +/- 0.01) V-1.88 +/- 0.16]. The power law indices (-1.28 +/- 0.03;-1.88 +/- 0.16) obtained by the observational analysis slightly differ from the power law index (-1.67) obtained by a theoretical model. The observations are consistent with adiabatic expansion of the coronal source component.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17388
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