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Title: DARK RIBBONS PROPAGATING AND SWEEPING ACROSS EXTREME ULTRAVIOLET STRUCTURES AFTER FILAMENT ERUPTIONS

Abstract

With observations from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, we first report that dark ribbons (DRs) moved apart from the filament channel and swept across EUV structures after filament eruptions on 2013 June 23 and 2012 February 10 and 24, respectively. In the first event, the DR with a length of 168 Mm appeared at 100 Mm to the northwest of the filament channel, where the filament erupted 15 hr previously. The DR moved toward the northwest with the different sections having different velocities, ranging from 0.3 to 1.6 km s{sup −1}. When the DR’s middle part swept across a strong EUV structure, the motion of this part was blocked, appearing to deflect the DR. With the DR propagation, the connection of the surrounding EUV structures gradually changed. After one day passed, the DR eventually disappeared. In the other two events, the dynamic evolution of the DRs was similar to that in the first event. Based on the observations, we speculate that the reconnection during the filament eruption changes the configuration of the surrounding magnetic fields systematically. During the reconnection process, magnetic fields are deflecting and the former arbitrarily distributed magnetic fields are rearranged along specificmore » directions. The deflection of magnetic fields results in an instantaneous void region where the magnetic strength is smaller and the plasma density is lower. Consequently, the void region is observed as a DR and propagates outward with the reconnection developing.« less

Authors:
; ; ;  [1]
  1. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
Publication Date:
OSTI Identifier:
22522412
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 805; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EXTREME ULTRAVIOLET RADIATION; FILAMENTS; MAGNETIC FIELDS; PLASMA DENSITY; STAR EVOLUTION; SUN; VELOCITY

Citation Formats

Xiao, Junmin, Zhang, Jun, Li, Ting, and Yang, Shuhong, E-mail: xiaojm@nao.cas.cn, E-mail: zjun@nao.cas.cn, E-mail: liting@nao.cas.cn, E-mail: shuhongyang@nao.cas.cn. DARK RIBBONS PROPAGATING AND SWEEPING ACROSS EXTREME ULTRAVIOLET STRUCTURES AFTER FILAMENT ERUPTIONS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/805/1/25.
Xiao, Junmin, Zhang, Jun, Li, Ting, & Yang, Shuhong, E-mail: xiaojm@nao.cas.cn, E-mail: zjun@nao.cas.cn, E-mail: liting@nao.cas.cn, E-mail: shuhongyang@nao.cas.cn. DARK RIBBONS PROPAGATING AND SWEEPING ACROSS EXTREME ULTRAVIOLET STRUCTURES AFTER FILAMENT ERUPTIONS. United States. doi:10.1088/0004-637X/805/1/25.
Xiao, Junmin, Zhang, Jun, Li, Ting, and Yang, Shuhong, E-mail: xiaojm@nao.cas.cn, E-mail: zjun@nao.cas.cn, E-mail: liting@nao.cas.cn, E-mail: shuhongyang@nao.cas.cn. Wed . "DARK RIBBONS PROPAGATING AND SWEEPING ACROSS EXTREME ULTRAVIOLET STRUCTURES AFTER FILAMENT ERUPTIONS". United States. doi:10.1088/0004-637X/805/1/25.
@article{osti_22522412,
title = {DARK RIBBONS PROPAGATING AND SWEEPING ACROSS EXTREME ULTRAVIOLET STRUCTURES AFTER FILAMENT ERUPTIONS},
author = {Xiao, Junmin and Zhang, Jun and Li, Ting and Yang, Shuhong, E-mail: xiaojm@nao.cas.cn, E-mail: zjun@nao.cas.cn, E-mail: liting@nao.cas.cn, E-mail: shuhongyang@nao.cas.cn},
abstractNote = {With observations from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, we first report that dark ribbons (DRs) moved apart from the filament channel and swept across EUV structures after filament eruptions on 2013 June 23 and 2012 February 10 and 24, respectively. In the first event, the DR with a length of 168 Mm appeared at 100 Mm to the northwest of the filament channel, where the filament erupted 15 hr previously. The DR moved toward the northwest with the different sections having different velocities, ranging from 0.3 to 1.6 km s{sup −1}. When the DR’s middle part swept across a strong EUV structure, the motion of this part was blocked, appearing to deflect the DR. With the DR propagation, the connection of the surrounding EUV structures gradually changed. After one day passed, the DR eventually disappeared. In the other two events, the dynamic evolution of the DRs was similar to that in the first event. Based on the observations, we speculate that the reconnection during the filament eruption changes the configuration of the surrounding magnetic fields systematically. During the reconnection process, magnetic fields are deflecting and the former arbitrarily distributed magnetic fields are rearranged along specific directions. The deflection of magnetic fields results in an instantaneous void region where the magnetic strength is smaller and the plasma density is lower. Consequently, the void region is observed as a DR and propagates outward with the reconnection developing.},
doi = {10.1088/0004-637X/805/1/25},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 805,
place = {United States},
year = {2015},
month = {5}
}