Velocities of Flare Kernels and the Mapping Norm of Field Line Connectivity

0511510 - ASÚ 2020 RIV US eng J - Journal Article
Lörinčík, Juraj - Aulanier, G. - Dudík, Jaroslav - Zemanová, Alena - Dzifčáková, Elena
Velocities of Flare Kernels and the Mapping Norm of Field Line Connectivity.
Astrophysical Journal. Roč. 881, č. 1 (2019), č. článku 68. ISSN 0004-637X. E-ISSN 1538-4357
R&D Projects: GA ČR(CZ) GA17-16447S
Institutional support: RVO:67985815
Keywords : magnetic reconnection * solar flares * transition region
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.746, year: 2019
Method of publishing: Limited access
https://doi.org/10.3847/1538-4357/ab298f

We report on observations of flare ribbon kernels during the 2012 August 31 filament eruption. In the 1600 and 304 angstrom channels of the Atmospheric Imaging Assembly, flare kernels were observed to move along flare ribbons at velocities v(parallel to) of up to 450 km s(-1). Kernel velocities were found to be roughly anticorrelated with strength of the magnetic field. An apparent slipping motion of the flare loops was observed in the 131 angstrom only for the slowest kernels moving through the strong-B region. In order to interpret the observed relation between B-LOS and v(parallel to), we examined the distribution of the norm N, a quantity closely related to the slippage velocity.
Permanent Link: http://hdl.handle.net/11104/0301758