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Abstract
The 3-part appearance of many coronal mass ejections (CMEs) arising from
erupting filaments emerges from a large magnetic flux tube structure,
consistent with the form of the erupting filament system. Other CMEs
arising from erupting filaments lack a clear 3-part structure and
reasons for this have not been researched in detail. This paper aims to
further establish the link between CME structure and the structure of
the erupting filament system and to investigate whether CMEs which lack
a 3-part structure have different eruption characteristics. A survey is
made of 221 near-limb filament eruptions observed from 2013 May 03 to
2014 June 30 by Extreme UltraViolet (EUV) imagers and coronagraphs.
Ninety-two filament eruptions are associated with 3-part structured
CMEs, 41 eruptions are associated with unstructured CMEs. The remaining
88 are categorized as failed eruptions. For 34% of the 3-part CMEs,
processing applied to EUV images reveals the erupting front edge is a
pre-existing loop structure surrounding the filament, which subsequently
erupts with the filament to form the leading bright front edge of the
CME. This connection is confirmed by a flux-rope density model.
Furthermore, the unstructured CMEs have a narrower distribution of mass
compared to structured CMEs, with total mass comparable to the mass of
3-part CME cores. This study supports the interpretation of 3-part CME
leading fronts as the outer boundaries of a large pre-existing flux
tube. Unstructured (non 3-part) CMEs are a different family to
structured CMEs, arising from the eruption of filaments which are
compact flux tubes in the absence of a large system of enclosing closed
field.
Original language | English |
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Pages (from-to) | 35 |
Journal | Astrophysical Journal |
Volume | 813 |
Issue number | 1 |
DOIs | |
Publication status | Published - 01 Nov 2015 |
Keywords
- Sun: corona
- Sun: coronal mass ejections: CMEs
- Sun: filaments
- prominences
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Dive into the research topics of 'Erupting Filaments with Large Enclosing Flux Tubes as Sources of High-mass Three-part CMEs, and Erupting Filaments in the Absence of Enclosing Flux Tubes as Sources of Low-mass Unstructured CMEs'. Together they form a unique fingerprint.Profiles
Projects
- 1 Finished
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Coronal Mass Ejections and other dynamic activity in the solar corona: studies and analysis methods for white light and extreme ultraviolet observatio
Hutton, J. (PI)
01 Oct 2013 → 30 Sept 2016
Project: Externally funded research