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Observations and modeling of the early acceleration phase of erupting filaments involved in coronal mass ejections
C. J. Schrijver, C. Elmore, B. Kliem +2
We examine the early phases of two near-limb filament destabilization involved in coronal mass ejections on 16 June and 27 July 2005, using high-resolution, high-cadence observatio…
Numerical simulations of fast and slow coronal mass ejections
T. Toeroek, B. Kliem
Solar coronal mass ejections (CMEs) show a large variety in their kinematic properties. CMEs originating in active regions and accompanied by strong flares are usually faster and a…
Testing non-linear force-free coronal magnetic field extrapolations with the Titov-Demoulin equilibrium
Thomas Wiegelmann, Bernd Inhester, Bernhard Kliem +2
CONTEXT: As the coronal magnetic field can usually not be measured directly, it has to be extrapolated from photospheric measurements into the corona. AIMS: We test the quality of…
Confined and ejective eruptions of kink-unstable flux ropes
T. Toeroek, B. Kliem
The ideal helical kink instability of a force-free coronal magnetic flux rope, anchored in the photosphere, is studied as a model for solar eruptions. Using the flux rope model of…
Eruption of a Kink-Unstable Filament in Active Region NOAA 10696
D. R. Williams, T. Toeroek, P. Demoulin +2
We present rapid-cadence Transition Region And Coronal Explorer (TRACE) observations which show evidence of a filament eruption from active region NOAA 10696, accompanied by an X2.…
Formation of current sheets and sigmoidal structure by the kink instability of a magnetic loop
B. Kliem, V. S. Titov, T. Toeroek
We study dynamical consequences of the kink instability of a twisted coronal flux rope, using the force-free coronal loop model by Titov & Démoulin (1999) as the initial condition…
Ideal kink instability of a magnetic loop equilibrium
T. Toeroek, B. Kliem, V. S. Titov
The force-free coronal loop model by Titov & Démoulin (1999} is found to be unstable with respect to the ideal kink mode, which suggests this instability as a mechanism for the ini…
Microwave plasma emission of a flare on AD Leo
A. V. Stepanov, B. Kliem, V. V. Zaitsev +5
An intense radio flare on the dMe star AD Leo, observed with the Effelsberg radio telescope and spectrally resolved in a band of 480 MHz centred at 4.85 GHz is analysed. A lower li…
Solar flare radio pulsations as a signature of dynamic magnetic reconnection
B. Kliem, M. Karlicky, A. O. Benz
Decimetric radio observations of the impulsive solar flare on October 5, 1992, 09:25 UT show a long series of quasi-periodic pulsations deeply modulating a continuum in the 0.6-2 G…
Three-dimensional spontaneous magnetic reconnection in neutral current sheets
Joerg Schumacher, Bernhard Kliem, Norbert Seehafer
Magnetic reconnection in an antiparallel uniform Harris current sheet equilibrium, which is initially perturbed by a region of enhanced resistivity limited in all three dimensions,…