| Name: | Shubhashri S Shenoy |
| Affiliation: | Manipal Institute of Technology, Manipal Academy of Higher Education |
| Conference ID : | ASI2024_494 |
| Title : | High Spectral Resolution Observations of Solar Flares using XSM on Chandrayaan-2 |
| Authors : | Shubhashri S Shenoy 1, Sreejith Padinhatteeri 2, Shyama Narendranath 3 |
| Authors Affiliation: | 1 Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka - 576104, India
2 Manipal Centre for Natural Sciences, Centre of Excellence, Manipal Academy of Higher Education, Karnataka, Manipal - 576104, India
3 Space Astronomy Group, U R Rao Satellite Centre, ISRO, Bengaluru - 576017, India |
| Mode of Presentation: | Poster |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | A solar flare is a sudden release of energy from the sun that occurs in a short timescale of few
minutes to hours. These flares cause sudden heating of the flaring region and can cause
changes in many other properties of the solar coronal plasma. X-ray spectroscopic observations are used to study the properties of plasma in the solar corona. Spectra with high spectral resolution can resolve spectral line complexes, providing an avenue to probe compositional changes in the flare plasma.
In this study, we used high-resolution spectral data from the Solar X-ray Monitor (XSM) onboard the Chandrayaan-2 mission to study different solar flares ranging from A-class to X-class. XSM observes the solar spectrum in the energy range from 1 keV to 15 keV with an energy resolution better than 200 ev at 6 KeV. We fit the flare spectra with different theoretical models (thermal and non-thermal) using the tools PyXSPEC and OSPEX, and we observed the emission lines of different elements, mainly Mg, Al, Si, Fe, Ca, and S which are low FIP elements (FIP < 10eV). We estimated the FIP bias of these elements during the evolution of the different classes of flares using the abundance values. We also estimated various plasma properties such as temperature, emission measure, multi-thermal DEM, electron spectral index, low energy cut-off, break energies, thermal and non-thermal flux, and evolution of elemental abundances from the spectral analysis. This study covering a wide range in flare strengths, helps to compare the flare plasma evolution and evaluate the validity of scaling across these events. |
