High-resolution Observations of Clustered Dynamic Extreme-Ultraviolet Bright Tadpoles Near the Footpoints of Corona Loops

被引：0

作者：

Wang, Rui ^{[1
,2
,3
]}

Liu, Ying D. ^{[1
,2
,3
]}

Chitta, L. P. ^{[4
]}

Hu, Huidong ^{[1
,2
]}

Zhao, Xiaowei ^{[5
,6
]}

机构：

[1] Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Solar Act & Space Weather, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Max Planck Inst Sonnensystemforschung, Justus von Liebig Weg 3, D-37077 Gottingen, Germany

[5] China Meteorol Adm, Natl Satellite Meteorol Ctr, Natl Ctr Space Weather, Key Lab Space Weather, Beijing 100081, Peoples R China

[6] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2024年 / 24卷 / 12期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Sun: activity; Sun: atmosphere; Sun: corona; Sun: transition region; X-RAY JETS; SOLAR ORBITER; SPICULES; ORIGIN; ERUPTIONS; IMAGER; MODEL; SDO;

D O I：

10.1088/1674-4527/ad8a09

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An extreme ultraviolet (EUV) close-up view of the Sun offers unprecedented detail of heating events in the solar corona. Enhanced temporal and spatial images obtained by the Solar Orbiter during its first science perihelion enabled us to identify clustered EUV bright tadpoles (CEBTs) occurring near the footpoints of coronal loops. Combining SDO/AIA observations, we determine the altitudes of six distinct CEBTs by stereoscopy, ranging from similar to 1300 to 3300 km. We then notice a substantial presence of dark, cooler filamentary structures seemingly beneath the CEBTs, displaying periodic up-and-down motions lasting 3-5 minutes. This periodic behavior suggests an association of the majority of CEBTs with Type I spicules. Out of the ten selected CEBTs with fast downward velocity, six exhibit corrected velocities close to or exceeding 50 km s(-1). These velocities notably surpass the typical speeds of Type I spicules. We explore the generation of such velocities. It indicates that due to the previous limited observations of spicules in the EUV wavelengths, they may reveal novel observational features beyond our current understanding. Gaining insights into these features contributes to a better comprehension of small-scale coronal heating dynamics.

引用

页数：14

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