Confirming a Possible CSM/ISM Interaction in Three Radio-Detected Type I Supernovae
Abstract
We undertook a ground-based, narrow-band imaging survey of old Type I and Type IIb supernovae (SNe) in H alpha in order to detect signatures of late-time interaction between the SN ejecta and circumstellar material (CSM) from the progenitor system. Of the many dozens of SNe observed to date, we identified eight very promising candidates. We made joint Chandra and VLA observations of these candidates to both confirm and further study the CSM interaction taking place in these SNe. We discovered radio emission from three of these Type I Supernovae, SNe 1937D (Ia), 2004dk (Ic), and 2005kl (Ic). Following those discoveries, additional follow-up observations with the VLA have confirmed these discoveries, we present the results of this radio search and report their spectral indices across multiple VLA observing bands, and discuss the implications of these observations. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
- Publication:
-
American Astronomical Society Meeting Abstracts
- Pub Date:
- January 2023
- Bibcode:
- 2023AAS...24110730S