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arXiv · 1804.00867

A comparative study between a failed and a successful eruption initiated from the same polarity inversion line in AR 11387

Lijuan Liu·Yuming Wang·Zhenjun Zhou·Karin Dissauer·Manuela Temmer·Jun Cui
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Abstract

In this paper, we analyzed a failed and a successful eruption that initiated from the same polarity inversion line within NOAA AR 11387 on December 25, 2011. They both started from a reconnection between sheared arcades, having distinct pre-eruption conditions and eruption details: before the failed one, the magnetic fields of the core region had a weaker non-potentiality; the external fields had a similar critical height for torus instability, a similar local torus-stable region, but a larger magnetic flux ratio (of low corona and near-surface region) as compared to the successful one. During the failed eruption, a smaller Lorentz force impulse was exerted on the outward ejecta; the ejecta had a much slower rising speed. Factors that might lead to the initiation of the failed eruption are identified: 1) a weaker non-potentiality of the core region, and a smaller Lorentz force impulse gave the ejecta a small momentum; 2) the large flux ratio, and the local torus-stable region in the corona provided strong confinements that made the erupting structure regain an equilibrium state.

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Lijuan Liu, Yuming Wang, Zhenjun Zhou, Karin Dissauer, Manuela Temmer, Jun Cui. 2018-04-03. A comparative study between a failed and a successful eruption initiated from the same polarity inversion line in AR 11387. https://doi.org/10.3847/1538-4357%2Faabba2

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