Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897412" target="_blank" >RIV/60076658:12310/18:43897412 - isvavai.cz</a>

Výsledek na webu

<a href="https://academic.oup.com/mnras/article/474/1/77/4564441" target="_blank" >https://academic.oup.com/mnras/article/474/1/77/4564441</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stx2763" target="_blank" >10.1093/mnras/stx2763</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube

Popis výsledku v původním jazyce

We perform numerical simulations of impulsively generated magnetic swirls in an isolated flux tube that is rooted in the solar photosphere. These swirls are triggered by an initial pulse in a horizontal component of the velocity. The initial pulse is launched either (a) centrally, within the localized magnetic flux tube or (b) off-central, in the ambient medium. The evolution and dynamics of the flux tube are described by three-dimensional, ideal magnetohydrodynamic equations. These equations are numerically solved to reveal that in case (a) dipole-like swirls associated with the fast magnetoacoustic kink and m = 1 Alfven waves are generated. In case (b), the fast magnetoacoustic kink and m = 0 Alfven modes are excited. In both these cases, the excited fast magnetoacoustic kink and Alfven waves consist of a similar flow pattern and magnetic shells are also generated with clockwise and counter-clockwise rotating plasma within them, which can be the proxy of dipole-shaped chromospheric swirls. The complex dynamics of vortices and wave perturbations reveals the channelling of sufficient amount of energy to fulfil energy losses in the chromosphere (similar to 10(4) W m(-1)) and in the corona (similar to 10(2) W m(-1)). Some of these numerical findings are reminiscent of signatures in recent observational data.

Název v anglickém jazyce

Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube

Popis výsledku anglicky

We perform numerical simulations of impulsively generated magnetic swirls in an isolated flux tube that is rooted in the solar photosphere. These swirls are triggered by an initial pulse in a horizontal component of the velocity. The initial pulse is launched either (a) centrally, within the localized magnetic flux tube or (b) off-central, in the ambient medium. The evolution and dynamics of the flux tube are described by three-dimensional, ideal magnetohydrodynamic equations. These equations are numerically solved to reveal that in case (a) dipole-like swirls associated with the fast magnetoacoustic kink and m = 1 Alfven waves are generated. In case (b), the fast magnetoacoustic kink and m = 0 Alfven modes are excited. In both these cases, the excited fast magnetoacoustic kink and Alfven waves consist of a similar flow pattern and magnetic shells are also generated with clockwise and counter-clockwise rotating plasma within them, which can be the proxy of dipole-shaped chromospheric swirls. The complex dynamics of vortices and wave perturbations reveals the channelling of sufficient amount of energy to fulfil energy losses in the chromosphere (similar to 10(4) W m(-1)) and in the corona (similar to 10(2) W m(-1)). Some of these numerical findings are reminiscent of signatures in recent observational data.

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/GA16-13277S" target="_blank" >GA16-13277S: Magnetoakustické vlny v diagnostice plazmatu ve sluneční koróně: nový pohled prostřednictvím pokročilých numerických simulací</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

474

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

77-87

Kód UT WoS článku

000424339500008

EID výsledku v databázi Scopus

2-s2.0-85045952873