Abstract Details

Name: Lakshitha Nama
Affiliation: Christ (Deemed to be University)
Conference ID: ASI2021_431
Title : Spectral evolution of flare plasma parameters with Solar X-ray Monitor on Chandrayaan-2
Authors and Co-Authors : Lakshitha Nama (Christ, Deemed to be University), Dr.Shyama Narendranath (URSC, ISRO), Dr.Paul K.T (Christ, Deemed to be University)
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : Solar flares are among the most exciting and widely studied phenomena on the Sun. A solar flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. It is a dynamic phenomenon that is associated with the release of enormous energy of the order of 10^26 to 10^32 ergs, along with plasma and particles, in a very short time of 100 to 1000 seconds. These particles move through the Sun’s corona into outer space. Even though radiation is emitted in all the wavelengths, the peak is in X rays. As the flare evolves, along with intense brightness variations, its plasma parameters such as temperature, emission measure and chemical abundance also change. By modelling the X-ray spectral data, it is possible to calculate all the plasma parameters. In the low solar activity period of 2019, several small flares in the A-B class are observed with the Solar X-ray Monitor (XSM) onboard Chandrayaan 2. The disk averaged solar spectrum in the 1.3 to 20 keV is measured at high time resolution from the lunar orbit. We present the evolution of temperature, emission measure and chemical abundances for several low-intensity flares and compare them to values at quiet times.