Abstract Details

Name: Girjesh R Gupta
Affiliation: Physical Research Laboratory
Conference ID: ASI2021_462
Title : Heating of small-scale loops by solar UV bursts
Authors and Co-Authors : Girjesh R Gupta (USO/PRL), Sushree Nayak (USO/PRL)
Abstract Type : Invited
Abstract Category : Sun and the Solar System
Abstract : Solar ultraviolet bursts (UVBs) are intense, short-lived, and compact brightening events observed at ~10^5 K. Their intense emission with highly complex Si IV line profiles and optically thin formation provides unique diagnostic opportunities for studying the dynamics and heating of lower solar atmosphere. In this talk, few studies of UV bursts which lead to the brightening of associated overlying small-scale short-lived hot and cool loops will be presented. Density estimates suggest that these bursts are occurring at low/mid chromospheric heights. Some of these bursts are associated with photospheric magnetic flux cancellation sites, thus suggesting that these bursts are probably small-scale magnetic reconnection events. We will also discuss estimates on available magnetic energy, and thermal and kinetic energy released during the bursts.