Speaker
Description
First Name: Soumya
Last Name: Roy
Email Address: soumyaroy@iucaa.in
Affiliation: Physical Research Laboratory, Ahmedabad, Gujarat, India
All Authors: Soumya Roy
Abstract: Solar flares are among the most energetic phenomena in the solar atmosphere, releasing vast amounts of energy that drive dynamic changes across multiple layers. Understanding their impact on the lower solar atmosphere is critical for modelling energy transport and atmospheric coupling. We present the near-ultraviolet observations of solar flares using the Solar Ultraviolet Imaging Telescope (SUIT) onboard Aditya-L1, focusing on flare signatures in the chromosphere and transition region. SUIT provides full-disk imaging in multiple narrowband UV filters spanning 200–400 nm, enabling simultaneous monitoring of different atmospheric layers of the Sun. We observed the flares in the Mg window and its wings, as well as the continuum across the Balmer jump with two narrowband and one broadband filters. These filters together probe the upper photosphere and lower chromopsheric heights driven by the precipitation during a flare, constraining the physical processes in the impulsive phase of the flare. The signatures observed complement high-energy diagnostics from other instruments, offering a multi-layered view of flare dynamics. These first results demonstrate SUIT’s unique capability to capture chromospheric and transition region responses during flares, providing critical insights into energy coupling between atmospheric layers and pave the way for improved flare modelling.