Expanding and Contracting Coronal Loops as Evidence of Vortex Flows Induced by Solar Eruptions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00478680" target="_blank" >RIV/67985815:_____/17:00478680 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3847/1538-4357/aa7aab" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aa7aab</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/aa7aab" target="_blank" >10.3847/1538-4357/aa7aab</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Expanding and Contracting Coronal Loops as Evidence of Vortex Flows Induced by Solar Eruptions

Popis výsledku v původním jazyce

Eruptive solar flares were predicted to generate large-scale vortex flows at both sides of the erupting magnetic flux rope. This process is analogous to a well-known hydrodynamic process creating vortex rings. The vortices lead to advection of closed coronal loops located at the peripheries of the flaring active region. Outward flows are expected in the upper part and returning flows in the lower part of the vortex. Here, we examine two eruptive solar flares, the X1.1-class flare SOL2012-03-05T03: 20 and the C3.5-class SOL2013-06-19T07:29. In both flares, we find that the coronal loops observed by the Atmospheric Imaging Assembly in its 171 angstrom, 193 angstrom, or 211 angstrom passbands show coexistence of expanding and contracting motions, in accordance with the model prediction. In the X-class flare, multiple expanding and contracting loops coexist for more than 35 minutes, while in the C-class flare, an expanding loop in 193 angstrom appears to be close by and cotemporal with an apparently imploding loop arcade seen in 171 angstrom. Later, the 193 angstrom loop also switches to contraction. These observations are naturally explained by vortex flows present in a model of eruptive solar flares.

Název v anglickém jazyce

Expanding and Contracting Coronal Loops as Evidence of Vortex Flows Induced by Solar Eruptions

Popis výsledku anglicky

Eruptive solar flares were predicted to generate large-scale vortex flows at both sides of the erupting magnetic flux rope. This process is analogous to a well-known hydrodynamic process creating vortex rings. The vortices lead to advection of closed coronal loops located at the peripheries of the flaring active region. Outward flows are expected in the upper part and returning flows in the lower part of the vortex. Here, we examine two eruptive solar flares, the X1.1-class flare SOL2012-03-05T03: 20 and the C3.5-class SOL2013-06-19T07:29. In both flares, we find that the coronal loops observed by the Atmospheric Imaging Assembly in its 171 angstrom, 193 angstrom, or 211 angstrom passbands show coexistence of expanding and contracting motions, in accordance with the model prediction. In the X-class flare, multiple expanding and contracting loops coexist for more than 35 minutes, while in the C-class flare, an expanding loop in 193 angstrom appears to be close by and cotemporal with an apparently imploding loop arcade seen in 171 angstrom. Later, the 193 angstrom loop also switches to contraction. These observations are naturally explained by vortex flows present in a model of eruptive solar flares.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA17-16447S" target="_blank" >GA17-16447S: Klouzavá magnetická rekonexe ve slunečních erupcích: analýza multispektrálních pozorování, dynamika a netermální simulace chladnutí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Svazek periodika

844

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

"1/1"-"1/15"

Kód UT WoS článku

000406015000017

EID výsledku v databázi Scopus

2-s2.0-85026382218