| Autor: |
Möstl, U. V., Temmer, M., Veronig, A. M. |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
The Astrophysical Journal Letters, 766:L12 (6pp), 2013 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1088/2041-8205/766/1/L12 |
| Popis: |
The Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory observed a coronal mass ejection with an embedded filament on 2011 February 24, reavealing quasi-periodic vortex-like structures at the northern side of the filament boundary with a wavelength of approximately 14.4 Mm and a propagation speed of about 310 +- 20 km/s. These structures could result from the Kelvin-Helmholtz instability occurring on the boundary. We perform 2.5D numerical simulations of the Kelvin-Helmholtz instability and compare the simulated characteristic properties of the instability with the observations, where we obtain qualitative as well as quantitative accordance. We study the absence of Kelvin-Helmholtz vortex-like structures on the southern side of the filament boundary and find that a magnetic field component parallel to the boundary with a strength of about 20% of the total magnetic field has stabilizing effects resulting in an asymmetric development of the instability. |
| Databáze: |
arXiv |
| Externí odkaz: |
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