Abstract Details

Name: Poonam Chandra
Affiliation: NCRA-TIFR
Conference ID: ASI2021_270
Title : Transient phenomena in radio bands - critical insights into lives and deaths of massive stars
Authors and Co-Authors : Barnali Das (NCRA-TIFR), A. J. Nayana, R. A. Chevalier (Univ Virginia), B. Maity (NCRA), G. Wade (RMC, Canada)
Abstract Type : Invited
Abstract Category : Plenary
Abstract : Massive stars end their lives as one of the biggest explosions in the Universe, supernovae and gamma-ray bursts. Around 10% massive stars are magnetic and a subset of them display a highly transient and coherent electron cyclotron maser emission, which allows us to understand their 3D magnetic topology and decipher the plasma properties surrounding these stars. These have important implications in stellar evolution, their mass-loss rates and the final demise. On the other hand, study of transient radio emission from their explosions via circumstellar interactions allow us to peep into their progenitor lives thousands of years before their demise. In this talk, I will present study of sub-GHz transient emission from massive stars and their end products, supernovae and gamma ray bursts. I will summarise how these studies have helped us gain critical understanding of these transient phenomenon and their implications for stellar evolution.