Characterizing solar eruptions in inner corona using ground and space-based data

Abstract

The solar corona is known to be associated with eruptions of large amount of magnetized plasma into the interplanetary space. In-spite of several years of groundand space-based observations of the solar atmosphere, the inner corona (<4 Rsun) has not been explored in detail. As a result the initial dynamics of various eruptive features such as coronal mass ejections (CMEs), and associated plasmoids, extreme ultraviolet (EUV) eruptions, etc. have not been understood completely. Aditya- L1 is India’s first space-based mission to study the Sun from the Lagrange 1 (L1) position scheduled to be launched in 2022-23. Visible Emission Line Coronagraph (VELC) is one of the seven payloads on-board Aditya-L1 and will probe the inner corona from 1.05 – 3 R⊙ with 10 ˚A pass-band centred at 5000 ˚A with high spatial (2.51 arcsec pixel−1) and temporal (10 s cadence) resolution. The main aim of VELC is to probe the inner corona with high resolution imaging and spectroscopy while capturing the initial dynamics of solar eruptions. This thesis is dedicated to the development of automated algorithms, enhancement of the coronal images to identify and characterize the solar eruptions in the inner corona at different spatial and temporal scales.