Thinkshop12

Observations of a delta-spot during an M-class flare

Peter Gömöry (Astronomical Institute of the Slovak Academy of Sciences)

Abstract. We present a study of the physical parameters of a delta-spot within active region NOAA 11865 derived from spectropolarimetric inversions before, during and after an M-class flare. The analysed near-infrared spectropolarimetric measurements of high angular resolution were obtained in two spectral lines (Fe I 1078.3 nm and Si I 1078.6 nm) with the Tenerife Infrared Polarimeter at the Vacuum Tower Telescope in Tenerife on October 15, 2013. Acquired full Stokes spectra were inverted using the code ‘Stokes Inversions based on Response functions’ (SIR) which allowed us to study the morphology, the magnetic field strength and inclination, and the velocity field of the observed delta-spot. Properties of the related M-class flare were derived using EUV and UV filtergrams provided by Atmospheric Imaging Assembly (AIA) instrument on-board the Solar Dynamics Observatory satellite.

Poster