Flare-related changes in pseudo-vector magnetic field derived from line-of-sight magnetograms
Abstract
Longitudinal field is a projection of full vector field to the line-of-sight direction. Thus, it is possible to derive some information about the vector field from line-of-sight data in round sunspots, assuming that average properties of vector magnetic field in these sunspots depend mostly on distance from center of sunspot. Under this assumption, one can reconstruct vertical, radial, and tangential components of vector magnetic field using azimuthal averaging. This technique can be useful for investigation of twist and inclination in magnetic field in particular in flaring regions when vector data are not available. In this study we validate the cylindrical symmetry technique on example of a simple round sunspot. Then we attempt to study changes in (pseudo-vector) magnetic fields in isolated and round sunspots associated with flare events using SDO/HMI longitudinal magnetograms. We compare the pseudo-vector results with vector data.
- Publication:
-
AAS/Solar Physics Division Abstracts #47
- Pub Date:
- May 2016
- Bibcode:
- 2016SPD....47.0637B