Abstract Details


Name: Deepak Kathait
Affiliation: IUCAA and University College, Thiruvananthapuram
Conference ID: TVS202510292
Title: Thermodynamic and Elemental Abundance Evolution of Homologous Flares from AR 13386
Authors and Co-Authors: Soumya roy, Vishal Upendran, Durgesh Tripathi, Sreejith Padinhatteeri, Anamparambu Ramaprakash, Nandita Srivastava
Abstract Type: Contributory Presentation
Abstract: Flares are an explosive conversion of magnetic free energy into radiation, acceleration of particles and localised plasma heating. We examine the evolution of elemental abundance along with thermal and non-thermal counterparts of three homologous flares from Active Region (AR) 13386, which were detected on August 5–6, 2023, by using imaging and spectroscopic data. We use data from different instruments with different vantage points. We cross-validate the time evolution of flare plasma properties using Differential Emission Measures (DEMs) obtained from AIA/SDO data with temperature estimations from GOES, XSM (onboard Chandrayaan-2). Temperature profiles and temporal patterns are consistent across all three datasets. To monitor shifts in elemental abundances, we examine XSM spectra. However, contamination from other flaring places prevents accurate abundance estimations for the first flare. FERMI records both flare loops and footpoints, enabling a comparison of spatial emission sources, whereas STIX/Solar Orbiter only views the flare loop arcades, with footpoints obscured. We compare this data and probe the interaction between loops and footpoints of the flare. The second flare exhibits an anomalous increase in elemental abundances during the impulsive phase, followed by a drop to photospheric values and a subsequent return to coronal values in the decay phase. The third flare does not show any anomalous increase in elemental abundance.