Speaker
Description
We present work carried out during the joint Bulgarian-Austrian research project on solar chromospheric and coronal activity. The aims of the project are to develop observing capability in Bulgaria to complement Austrian monitoring instruments, and to study chromospheric signatures of quiet sun and pre-eruptive active regions and multi-wavelength manifestation of solar eruptive phenomena, their morphology and kinematics. We have recently set up a narrow field of view solar imaging system at Belogradchik Astronomical Observatory, equipped with a DayStar Energy Rejection Filter (ERF) and a Hydrogen Alpha (Hα) Quantum filter, which is used to capture high-resolution images of solar prominences and sunspots, and is complementary to the Kanzelhohe Patrol Instrument (KPI). A recent study presents a quantitative comparison between confined, eruptive and all M-class solar flares over the last two solar cycles. The properties of the SFs, related radio bursts and the parent sunspots (Hale type and total area) were examined. We have recently developed hybrid (algorithmic and machine learning) models for automated segmentation of on-disk solar features (prominences and filaments) using Kanzelhöhe Observatory data. Here we showcase these and other results.
