On the progenitor and early evolution of the type II supernova 2009kr
Cosmology and Nongalactic Astrophysics
2014-11-20 v1 Solar and Stellar Astrophysics
Abstract
We report the identification of a source coincident with SN 2009kr in HST pre-explosion images. The object appears to be a single point source with an intrinsic colour V-I = 1.1 and M_V = -7.6. If this is a single star it would be a yellow supergiant of log L/L_{sol} \sim 5.1 and a mass of 15 (+5/-4) M_{sol}. The spatial resolution does not allow us yet to definitively determine if the progenitor object is a single star, a binary system, or a compact cluster. We show that the early lightcurve is flat, similar to IIP SNe, but that the the spectra are somewhat peculiar, displaying unusual P-Cygni profiles. The evolution of the expanding ejecta will play an important role in understanding the progenitor object.
Keywords
Cite
@article{arxiv.0912.2071,
title = {On the progenitor and early evolution of the type II supernova 2009kr},
author = {M. Fraser and K. Takats and A. Pastorello and S. J. Smartt and S. Mattila and M-T. Botticella and S. Valenti and M. Ergon and J. Sollerman and S. Benetti and F. Bufano and R. M. Crockett and I. J. Danziger and J. R. Maund and S. Taubenberger and M. Turatto},
journal= {arXiv preprint arXiv:0912.2071},
year = {2014}
}
Comments
Submitted to ApJ Letters