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Title: SYMPATHETIC SOLAR FILAMENT ERUPTIONS

Abstract

The 2015 March 15 coronal mass ejection as one of the two that together drove the largest geomagnetic storm of solar cycle 24 so far was associated with sympathetic filament eruptions. We investigate the relations between the different filaments involved in the eruption. A surge-like small-scale filament motion is confirmed as the trigger that initiated the erupting filament with multi-wavelength observations and using a forced magnetic field extrapolation method. When the erupting filament moved to an open magnetic field region, it experienced an obvious acceleration process and was accompanied by a C-class flare and the rise of another larger filament that eventually failed to erupt. We measure the decay index of the background magnetic field, which presents a critical height of 118 Mm. Combining with a potential field source surface extrapolation method, we analyze the distributions of the large-scale magnetic field, which indicates that the open magnetic field region may provide a favorable condition for F2 rapid acceleration and have some relation with the largest solar storm. The comparison between the successful and failed filament eruptions suggests that the confining magnetic field plays an important role in the preconditions for an eruption.

Authors:
; ; ; ;  [1];  [2]
  1. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190 (China)
  2. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China)
Publication Date:
OSTI Identifier:
22654248
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 827; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COMPARATIVE EVALUATIONS; DECAY; DISTRIBUTION; ERUPTION; EXTRAPOLATION; FILAMENTS; MAGNETIC FIELDS; MAGNETIC STORMS; MASS; SOLAR CYCLE; SUN; SURFACES; WAVELENGTHS

Citation Formats

Wang, Rui, Liu, Ying D., Zimovets, Ivan, Hu, Huidong, Yang, Zhongwei, and Dai, Xinghua, E-mail: liuxying@spaceweather.ac.cn. SYMPATHETIC SOLAR FILAMENT ERUPTIONS. United States: N. p., 2016. Web. doi:10.3847/2041-8205/827/1/L12.
Wang, Rui, Liu, Ying D., Zimovets, Ivan, Hu, Huidong, Yang, Zhongwei, & Dai, Xinghua, E-mail: liuxying@spaceweather.ac.cn. SYMPATHETIC SOLAR FILAMENT ERUPTIONS. United States. doi:10.3847/2041-8205/827/1/L12.
Wang, Rui, Liu, Ying D., Zimovets, Ivan, Hu, Huidong, Yang, Zhongwei, and Dai, Xinghua, E-mail: liuxying@spaceweather.ac.cn. Wed . "SYMPATHETIC SOLAR FILAMENT ERUPTIONS". United States. doi:10.3847/2041-8205/827/1/L12.
@article{osti_22654248,
title = {SYMPATHETIC SOLAR FILAMENT ERUPTIONS},
author = {Wang, Rui and Liu, Ying D. and Zimovets, Ivan and Hu, Huidong and Yang, Zhongwei and Dai, Xinghua, E-mail: liuxying@spaceweather.ac.cn},
abstractNote = {The 2015 March 15 coronal mass ejection as one of the two that together drove the largest geomagnetic storm of solar cycle 24 so far was associated with sympathetic filament eruptions. We investigate the relations between the different filaments involved in the eruption. A surge-like small-scale filament motion is confirmed as the trigger that initiated the erupting filament with multi-wavelength observations and using a forced magnetic field extrapolation method. When the erupting filament moved to an open magnetic field region, it experienced an obvious acceleration process and was accompanied by a C-class flare and the rise of another larger filament that eventually failed to erupt. We measure the decay index of the background magnetic field, which presents a critical height of 118 Mm. Combining with a potential field source surface extrapolation method, we analyze the distributions of the large-scale magnetic field, which indicates that the open magnetic field region may provide a favorable condition for F2 rapid acceleration and have some relation with the largest solar storm. The comparison between the successful and failed filament eruptions suggests that the confining magnetic field plays an important role in the preconditions for an eruption.},
doi = {10.3847/2041-8205/827/1/L12},
journal = {Astrophysical Journal Letters},
number = 1,
volume = 827,
place = {United States},
year = {Wed Aug 10 00:00:00 EDT 2016},
month = {Wed Aug 10 00:00:00 EDT 2016}
}