A detailed investigation on the evolution of interacting supernovae
by
Anjasha Gangopadhyay(Stockholm University)
→
Europe/Stockholm
FC61 (AlbaNova Main Building)
FC61
AlbaNova Main Building
Description
Supernovae (SNe) are the giant stellar explosions that briefly outshine the whole galaxy radiating a huge amount of energy. Interacting SNe are the group of SNe that show narrow emission lines of Hydrogen/Helium due to interaction with a dense circumstellar medium (CSM). They provide key insights into the mass-loss processes of massive stars and their circumstellar environments. This talk will highlight the diversity of interacting SNe, including Types IIn, Ibn, and Icn, exploring the challenges in understanding their progenitor systems, CSM structures, and late-time evolution. Through analytical models, we decipher that their lightcurves are mostly driven by CSM interaction rather than radioactive decay. Spectroscopically, they show both emission and P-cygni H/He lines due to different CSM densities and structures. The line strengths hint towards Wolf-Rayet or Luminous Blue Variables as typical progenitors. The unique CSM interactions and mass-loss rate estimates in Type IIn/Ibn SNe offer clues to episodic mass loss before explosion, enhancing our knowledge of core-collapse mechanisms. Continued observation of these events are essential to further explore the progenitor diversity and mass-loss dynamics underlying these explosive phenomena.
