Publication detail

Filament Leg-Leg Reconnection as a Source of Prominent Supra-arcade Downflows

DUDÍK, J. AULANIER, G. KAŠPAROVÁ, J. KARLICKÝ, M. ALENA ZEMANOVÁ, A. LÖRINČÍK, J. DRUCKMÜLLER, M.

Original Title

Filament Leg-Leg Reconnection as a Source of Prominent Supra-arcade Downflows

Type

journal article in Web of Science

Language

English

Original Abstract

We report on the interaction of the legs of the erupting filament of 2012 August 31 and associated prominent supra-arcade downflows (P-SADs) as observed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. We employ a number of image processing techniques to enhance weak interacting features. As the filament erupts, both legs stretch outwards. The positive-polarity leg also untwists and splits into two parts. The first part runs into the conjugate (negative-polarity) leg, tearing it apart. The second part then converges into the remnant of the conjugate leg, after which both weaken and finally disappear. All these episodes of interaction of oppositely oriented filament legs are followed by the appearance of P-SADs, seen in the on-disk projection to be shaped as loop tops, along with many weaker SADs. All SADs are preceded by hot supra-arcade downflowing loops. This observed evolution is consistent with the three-dimensional rr-rf (leg-leg) reconnection, where the erupting flux rope reconnects with itself. In our observations, as well as in some models, the reconnection in this geometry is found to be long lasting. It plays a substantial role in the evolution of the flux rope of the erupting filament and leads to prominent SADs.

Keywords

MAGNETIC RECONNECTION

Authors

DUDÍK, J.; AULANIER, G.; KAŠPAROVÁ, J.; KARLICKÝ, M.; ALENA ZEMANOVÁ, A.; LÖRINČÍK, J.; DRUCKMÜLLER, M.

Released

1. 8. 2022

Publisher

IOP Publishing Ltd

Location

BRISTOL

ISBN

2041-8213

Periodical

Astrophysical Journal Letters

Year of study

937

Number

1

State

United States of America

Pages from

L10

Pages to

L10

Pages count

7

URL

https://iopscience.iop.org/article/10.3847/2041-8213/ac8eaf/pdf

BibTex

@article{BUT180027,
  author="Jaroslav {Dudík} and Guillaume {Aulanier} and Jana {Kašparová} and Marian {Karlický} and Alena Zemanová {Alena Zemanová} and Juraj {Lörinčík} and Miloslav {Druckmüller}",
  title="Filament Leg-Leg Reconnection as a Source of Prominent Supra-arcade Downflows",
  journal="Astrophysical Journal Letters",
  year="2022",
  volume="937",
  number="1",
  pages="7",
  doi="10.3847/2041-8213/ac8eaf",
  issn="2041-8213",
  url="https://iopscience.iop.org/article/10.3847/2041-8213/ac8eaf/pdf"
}