Transverse oscillations of a double-structured solar filament

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901135" target="_blank" >RIV/60076658:12310/20:43901135 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/20:00534078
Result on the web
<a href="https://www.aanda.org/articles/aa/abs/2020/05/aa36836-19/aa36836-19.html" target="_blank" >https://www.aanda.org/articles/aa/abs/2020/05/aa36836-19/aa36836-19.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201936836" target="_blank" >10.1051/0004-6361/201936836</a>

Result language
angličtina
Original language name
Transverse oscillations of a double-structured solar filament
Original language description
Aims. We study the transverse oscillations of a double-structured solar filament.Methods. We modelled the filament numerically via a 2D magnetohydrodynamic (MHD) model, in which we solved a full set of time-dependent MHD equations by means of the FLASH code, using the adaptive mesh refinement method. We used the wavelet analysis method as a diagnostic tool for analysing periods in simulated oscillations.Results. We present a model of a solar filament combined with semi-empirical C7 model of the quiet solar atmosphere. This model is an alternative model of a filament based on the magnetostatic solution of MHD equations. We find that this double-structured filament oscillates with two different eigen frequencies. The ratio is approximately 1.75 (similar to 7.4 min/similar to 4.2 min), which is characteristic for this type of filament model. To show the details of these oscillations we present a time evolution of the plasma density, temperature, plasma beta parameter, and the ratio of gravity to magnetic pressure taken along the vertical axis of the filament at x=0. The periods found by numerical simulations are then discussed in comparison with those observed.
Czech name
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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
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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