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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00561622" target="_blank" >RIV/67985815:_____/22:00561622 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26210/22:PU146266
Result on the web
<a href="https://hdl.handle.net/11104/0334223" target="_blank" >https://hdl.handle.net/11104/0334223</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/2041-8213/ac8eaf" target="_blank" >10.3847/2041-8213/ac8eaf</a>

Result language
angličtina
Original language name
Filament Leg-Leg Reconnection as a Source of Prominent Supra-arcade Downflows
Original language description
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.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA20-07908S" target="_blank" >GA20-07908S: Three-dimensional magnetic reconnection in early phases of solar flares and eruptions: Observations and the Standard Model in 3D</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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