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Title: Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration

Abstract

Utilizing multiwavelength observations and magnetic field data from the Solar Dynamics Observatory ( SDO )/Atmospheric Imaging Assembly (AIA), SDO /Helioseismic and Magnetic Imager (HMI), the Geostationary Operational Environmental Satellite ( GOES ), and RHESSI , we investigate a large-scale ejective solar eruption of 2014 December 18 from active region NOAA 12241. This event produced a distinctive “three-ribbon” flare, having two parallel ribbons corresponding to the ribbons of a standard two-ribbon flare, and a larger-scale third quasi-circular ribbon offset from the other two. There are two components to this eruptive event. First, a flux rope forms above a strong-field polarity inversion line and erupts and grows as the parallel ribbons turn on, grow, and spread apart from that polarity inversion line; this evolution is consistent with the mechanism of tether-cutting reconnection for eruptions. Second, the eruption of the arcade that has the erupting flux rope in its core undergoes magnetic reconnection at the null point of a fan dome that envelops the erupting arcade, resulting in formation of the quasi-circular ribbon; this is consistent with the breakout reconnection mechanism for eruptions. We find that the parallel ribbons begin well before (∼12 minutes) the onset of the circular ribbon, indicating that tether-cuttingmore » reconnection (or a non-ideal MHD instability) initiated this event, rather than breakout reconnection. The overall setup for this large-scale eruption (diameter of the circular ribbon ∼10{sup 5} km) is analogous to that of coronal jets (base size ∼10{sup 4} km), many of which, according to recent findings, result from eruptions of small-scale “minifilaments.” Thus these findings confirm that eruptions of sheared-core magnetic arcades seated in fan–spine null-point magnetic topology happen on a wide range of size scales on the Sun.« less

Authors:
; ;  [1];
  1. School of Space Research, Kyung Hee University, Yongin, Gyeonggi-Do, 446-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22663127
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 845; 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; BLOWERS; CONFIGURATION; GAMMA RADIATION; GOES SATELLITES; INSTABILITY; MAGNETIC CORES; MAGNETIC FIELDS; MAGNETIC RECONNECTION; MAGNETOHYDRODYNAMICS; SOLAR FLARES; SUN; X RADIATION

Citation Formats

Joshi, Navin Chandra, Magara, Tetsuya, Moon, Yong-Jae, Sterling, Alphonse C., and Moore, Ronald L., E-mail: navin@khu.ac.kr, E-mail: njoshi98@gmail.com. Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7C1B.
Joshi, Navin Chandra, Magara, Tetsuya, Moon, Yong-Jae, Sterling, Alphonse C., & Moore, Ronald L., E-mail: navin@khu.ac.kr, E-mail: njoshi98@gmail.com. Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration. United States. https://doi.org/10.3847/1538-4357/AA7C1B
Joshi, Navin Chandra, Magara, Tetsuya, Moon, Yong-Jae, Sterling, Alphonse C., and Moore, Ronald L., E-mail: navin@khu.ac.kr, E-mail: njoshi98@gmail.com. 2017. "Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration". United States. https://doi.org/10.3847/1538-4357/AA7C1B.
@article{osti_22663127,
title = {Onset of a Large Ejective Solar Eruption from a Typical Coronal-jet-base Field Configuration},
author = {Joshi, Navin Chandra and Magara, Tetsuya and Moon, Yong-Jae and Sterling, Alphonse C. and Moore, Ronald L., E-mail: navin@khu.ac.kr, E-mail: njoshi98@gmail.com},
abstractNote = {Utilizing multiwavelength observations and magnetic field data from the Solar Dynamics Observatory ( SDO )/Atmospheric Imaging Assembly (AIA), SDO /Helioseismic and Magnetic Imager (HMI), the Geostationary Operational Environmental Satellite ( GOES ), and RHESSI , we investigate a large-scale ejective solar eruption of 2014 December 18 from active region NOAA 12241. This event produced a distinctive “three-ribbon” flare, having two parallel ribbons corresponding to the ribbons of a standard two-ribbon flare, and a larger-scale third quasi-circular ribbon offset from the other two. There are two components to this eruptive event. First, a flux rope forms above a strong-field polarity inversion line and erupts and grows as the parallel ribbons turn on, grow, and spread apart from that polarity inversion line; this evolution is consistent with the mechanism of tether-cutting reconnection for eruptions. Second, the eruption of the arcade that has the erupting flux rope in its core undergoes magnetic reconnection at the null point of a fan dome that envelops the erupting arcade, resulting in formation of the quasi-circular ribbon; this is consistent with the breakout reconnection mechanism for eruptions. We find that the parallel ribbons begin well before (∼12 minutes) the onset of the circular ribbon, indicating that tether-cutting reconnection (or a non-ideal MHD instability) initiated this event, rather than breakout reconnection. The overall setup for this large-scale eruption (diameter of the circular ribbon ∼10{sup 5} km) is analogous to that of coronal jets (base size ∼10{sup 4} km), many of which, according to recent findings, result from eruptions of small-scale “minifilaments.” Thus these findings confirm that eruptions of sheared-core magnetic arcades seated in fan–spine null-point magnetic topology happen on a wide range of size scales on the Sun.},
doi = {10.3847/1538-4357/AA7C1B},
url = {https://www.osti.gov/biblio/22663127}, journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 845,
place = {United States},
year = {Thu Aug 10 00:00:00 EDT 2017},
month = {Thu Aug 10 00:00:00 EDT 2017}
}