Abstract

Poster - Splinter Solar

Friday, 15 September 2023, 17:17   (H 3005)

Investigating Counter-streaming Flows prior to a Solar Filament Eruption

Andrea Diercke
Leibniz Institute for Solar Physics (KIS)

By unraveling the dynamics of solar filament eruptions, we gain crucial insights into the origins of space weather events that can trigger geomagnetic disturbances and impact our modern technological society. The critical moments leading up to these eruptions are still under investigation. In this study, we present the first results of a comprehensive analysis of counter-streaming flows along the spine of a filament, which appear prior and during its eruption. We will use full-disk H-alpha data of the Chromospheric Telescope (ChroTel), Tenerife, Spain and the Global Oscillation Network Group (GONG) to analyze the underlying mechanisms of the eruption process and their potential as predictive indicators. Moreover, ChroTel provides data in the chromospheric Ca II K, which is sensitive to the underlying magnetic field, along with He I 1083 nm lines, which can be used to create full-disk Dopplermaps of the Sun, investigating the line-of sight velocities of the filament during the eruption. Additionally, we use data of the Solar Dynamics Observatory (SDO) to study the filament’s dynamic in the transition region and Corona. Data from the Atmospheric Imaging Assambly (AIA) and ChroTel Hα will be used to calculate horizontal proper motions with local correlation tracking (LCT). Through this study, we aim to clarify the role of counter-streaming flows in the process of solar filament eruptions, which not only enhances our comprehension of these dynamic events but also contributes to the advancement of space weather forecasting capabilities and our broader understanding of solar-terrestrial interactions.