太阳极区冕洞内爆发事件的紫外光谱研究

大气与环境光学学报 ›› 2016, Vol. 11 ›› Issue (1): 22-30.

太阳极区冕洞内爆发事件的紫外光谱研究

章敏1,2, 王东1,2

(1. 安徽建筑大学数理学院, 安徽合肥, 230601;
2. 中国科学技术大学地球与空间科学学院, 安徽合肥, 230026)

收稿日期:2015-11-24 修回日期:2015-12-09 出版日期:2016-01-28 发布日期:2016-01-28
通讯作者: 章敏 (1980-)，女，安徽无为人，博士，副教授，研究方向为太阳大气光谱分析。 E-mail:chengzm@ustc.edu.cn
作者简介:章敏 (1980-)，女，安徽无为人，博士，副教授，研究方向为太阳大气光谱分析。
基金资助:
国家自然科学基金项目（41304134）、安徽省高校优秀青年人才基金重点项目（2013SQRL044ZD）、安徽省高校自然科学项目（KJ2014A046）、安徽建筑大学博士基金项目（K02654）、中科院知识创新重大项目(KZZD-EW-01-4)资助

Ultraviolet Spectrum Study on Explosive Events in the Solar Polar Coronal Hole

ZHANG Min1,2, WANG Dong1,2

(1 School of Mathematics and Physics, Anhui Jianzhu University, Heifei 230601, China;
2 School of Earth and Space Science, University of Science and Technology of China, Heifei 230026, China)

Received:2015-11-24 Revised:2015-12-09 Published:2016-01-28 Online:2016-01-28

摘要/Abstract

摘要：

SOHO/SUMER太阳紫外光谱仪的N IV谱线观测到极区冕洞内存在爆发事件。通过诊断，分别在南、北极区冕洞找到323条和207条爆发事件谱线。冕洞内爆发事件的出现率约10-21~10-20 cm-2s-1、寿命约2 min，与日面宁静区爆发事件的出现率基本一致。但极区冕洞内观测的爆发事件的空间尺度普遍较大（沿狭缝方向尺寸约4角秒），且靠近日面边缘可观测的爆发事件很少。极区冕洞内N IV谱线观测到的极区冕洞内爆发事件的视向速度多为蓝移。五个典型爆发事件中，爆发事件的谱线蓝翼比红翼明显，蓝翼速度可达200 km/s，接近当地阿尔芬速度。

关键词: 极区冕洞, 爆发事件, 紫外光谱

Abstract:

Explosive Events (EEs) in the Solar polar coronal hole are observed by N IV line of SOHO/SUMER spectrograph. 323 spectra of EEs in South polar coronal hole and 207 in North polar coronal hole are found. The statistical result shows that the EEs have an occurrence rate of about 10-21~10-20 cm-2s-1 and an average lifetime of around 2 min, which is consistent with the previous results obtained on the disk in quiet-Sun (QS) regions. However, EEs in polar coronal holes (PCHs) generally have a larger spatial size (～4 arcsec) on average. EEs are rarely observed near the limb. The average Doppler shifts deduced from NIV line in PCHs is red, while the Doppler shifts of EEs are mainly blue when a single Gaussian profile is fitted. The velocity of the five typical EE’s blue wing is up to 200 km/s, which is close to the local Alfven speed.

Key words: polar coronal holes, explosive events, UV line

中图分类号:

章敏王东. 太阳极区冕洞内爆发事件的紫外光谱研究[J]. 大气与环境光学学报, 2016, 11(1): 22-30.

ZHANG Min, WANG Dong. Ultraviolet Spectrum Study on Explosive Events in the Solar Polar Coronal Hole[J]. Journal of Atmospheric and Environmental Optics, 2016, 11(1): 22-30.

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