Conveners
Poster Session 3.5
- Jasmina Magdalenic (Solar-Terrestrial Centre of Excellence—SIDC, Royal Observatory of Belgium)
Twist is routinely used to quantify the location of flux ropes and to understand their evolution. At the Sun, we rely on the quantity Tw that describes how much two infinitesimally close field lines wind about each other due to its simple derivation from parallel current. In this work we present a simple method for the identification of a flux rope axis and the calculation of the winding...
Chromospheric oscillations with durations of approximately 3 minutes are prominent and thought to be related to the acoustic cut-off frequency of the medium. Here we used data from the CRISP instrument at the Swedish Solar Telescope and the Solar Dynamics Observatory to investigate intensity oscillations in an active region around the time of an M-class flare. Power spectrum fitting was used...
Polarization properties of solar radio emissions are known to be a rich source of information about the solar emission mechanisms and the magnetic field topology. Nonetheless, largely due to technical challenges, polarimetric imaging observations of the Sun at low radio frequencies have remained very rare. The degree of polarization of the solar radio emission varies dramatically over time,...
STIX on board Solar Orbiter uses an indirect imaging system to measure flare location, size and morphology. Pairs of tungsten grids create Moiré fringes on its coarsely pixelated CdTe detectors. Images are then reconstructed on the ground, using sophisticated imaging algorithms, after the full pixel has been download. STIX therefore uses a dedicated sub-collimator to estimate a rough (within a...
The X1.6 flare observed on 22 October 2014 (SOL2014-10-22T14:28) was among the strongest flares occurred in the great and magnetically complex active region NOAA 12192. It was a confined flare, without an accompanying CME, despite the large amount of released energy.
We attempt to deepen our understanding of the magnetic field configuration of NOAA 12192. We analyzed the polarization...
We report the first unambiguous observational evidence in the radio range of
the reflection of a coronal shock wave at the boundary of an equatorial coronal hole.
The eruption occurred on 2011 August 11 above active region NOAA 11263 and
was accompanied by an EUV wave, as evinced by AIA/SDO and EUVI/STEREO
observations, and an anomalous reverse-drifting metric type II radio burst,...
