Abstract Details


Name: Prakhar Singh
Affiliation: Aryabhatta Research Institute of Observational Sciences (ARIES)
Conference ID: TVS202510117
Title: Confined vs. Eruptive Solar Flares: A Thermal and Compositional Diagnostic Study with Aditya-L1/SoLEXS
Authors and Co-Authors: Prakhar Singh , Abhilash Sarwade
Abstract Type: Contributory Presentation
Abstract: Solar flares and coronal mass ejections (CMEs) are the Sun’s most energetic eruptions, but what determines whether a flare is "confined" or "eruptive" remains unclear. A key factor is how magnetic energy is divided among plasma heating, particle acceleration, and eruption kinetic energy. In this study, we investigate the thermal evolution of eruptive and confined flares by comparing high-cadence soft X-ray (SXR) spectral data from the Solar Low-energy X-ray Spectrometer (SoLEXS) aboard Aditya-L1. We analyze a sample of flares spanning different GOES classes (C, M, and X), including both CME-associated (eruptive) and non-eruptive (confined) events. For each flare, we perform time-resolved spectroscopic analysis to derive key plasma parameters: temperature (T), emission measure (EM), and elemental abundances. By examining the temporal evolution of T and EM across flare phases, we aim to identify systematic differences in heating and cooling of the two event types. We hypothesize that the energy required to initiate a CME may result in observable differences in the peak thermal properties or decay timescales of the flare plasma. Furthermore, we investigate whether the large-scale magnetic restructuring in eruptive events leads to distinct elemental abundance signatures, potentially indicating different plasma source regions or supply mechanisms compared to their confined counterparts. This work provides new observational constraints on the thermodynamics of solar flares and offers insights into the fundamental processes governing the flare–CME relationship.