Type II Supernovae with K2/Kepler
Abstract
We discovered two transient events in the original Kepler field with light curves that strongly suggest they are type II-P supernovae. A handful of additional candidate type II-P events have been detected in the K2 data, although none are as spectacular as the two observed during the Kepler mission. The original Kepler events, KSN2011a and KSN2011d, provided high-quality light curves from their initial rise and were followed to the end of their plateau phase. The well-sampled rise was used to estimate the size of the progenitor star and idealized analytic models allowed us to constraint their explosion energies. The early light curves of the two events were significantly different. KSN2011d displayed an inital brightening that is well-matched by predictions of a shock breakout in a red supergiant star. In contrast, KSN2011a did not show evidence for a shock break out, but its early rise was faster than expected possibly due to the supernova shockwave moving into pre-existing wind or mass-loss from the RSG.
- Publication:
-
American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23322902G