4 papers
SN 1994W: evidence of explosive mass ejection a few years before explosion
Nikolai N. Chugai, Robert J. Cumming, Sergei I. Blinnikov +7
We present and analyse spectra of the Type IIn supernova 1994W obtained between 18 and 202 days after explosion. During the first 100 days the line profiles are composed of three m…
Supernova progenitor constraints from circumstellar interaction: Type II
Robert J. Cumming, Peter Lundqvist
All types of supernovae (SNe), except Type Ia, have been observed to interact with their immediate circumstellar medium (CSM). This interaction can reveal their progenitor's histor…
Supernova progenitor constraints from circumstellar interaction: Type Ia
Peter Lundqvist, Robert J. Cumming
Searching for the presence of a circumstellar medium is a direct observational way to discriminate between different types of progenitor systems for Type Ia supernovae. We have mod…
An Observational Limit on Circumstellar H-Alpha from Supernova 1994D
R. J. Cumming, P. Lundqvist, L. J. Smith +2
We searched for narrow H in a high-resolution spectrum of SN 1994D taken 10 days before maximum, and found none. We estimate the limit this places on the progenitor mass loss, a…