Astrophysics Seminar

A major question in the field of explosive transients revolves around the progenitor scenarios and the remnants they leave behind. The interaction of the fastest ejecta from a supernova (SN) explosion with its circumstellar medium (CSM) produces X-ray and radio emission. Follow-up observations of SN-CSM interaction can give information about the progenitor's mass-loss history and the properties of the shock driven by the event. While long-term (>3 years) monitoring of supernovae (SNe) is not common, there is growing evidence for the re-emergence of radio emission in historical SNe. 

This provides valuable clues about the extended CSM and reveals insights about the central remnant. In this talk, I will present results from my X-ray and radio monitoring campaign of SN 2023ixf, the nearest SN of the last decade, emphasizing the properties of its complex CSM. From combined X-ray spectral analysis and radio modeling, we put constraints on the shock microphysical parameters and explored possible emission from secondary electrons. I will outline plans for continued monitoring, place SN2023ixf in the broader context of late-time radio brightening observed in historical SNe, and discuss the potential implications for understanding extended CSM and central remnants. 

I will conclude by highlighting the emerging class of Fast Transients that challenge traditional SN models, and how next-generation surveys such as LS4, LSST, and SKA will revolutionize our ability to detect, classify, and study these mysterious events in real time.