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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - 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/GA16-13277S" target="_blank" >GA16-13277S: Magnetoacoustic waves in diagnostics of solar coronal plasma: new insight through advanced numerical simulations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Volume of the periodical

474

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

77-87

UT code for WoS article

000424339500008

EID of the result in the Scopus database

2-s2.0-85045952873