Interacting supernovae and the first (and only) SN breakout we have seen

TYPEAstrophysics Seminar
Speaker:Gilad Svirski
Organizer:Hagai Perets
Time:14:30 - 15:30
Location:Lidow 620
Abstract:SN 2008D, discovered by Soderberg et al. 2008, is the most convincing direct detection of a shock breakout from a regular supernova (SN) to date.
Although the breakout scenario is not under dispute, there are inconsistencies between the observations and current SN breakout theory.
Most notably, the rise time of the breakout pulse is considerably longer than expected for a type Ibc SN, and the X-ray radiation features, mainly its flat spectrum and its luminosity evolution, are enigmatic.
Following a quick review on supernovae that interact with circumstellar medium, I will present a theoretical model for the observed radiation from a Wolf-Rayet SN exploding through a thick wind.
According to our model, an explosion through a thick wind, originally proposed by Soderberg et al. 2008, agrees with the previously unexplained observed features of SN 2008D.
The inferred progenitor and SN parameters are typical for an exploding Wolf-Rayet.