A1 Refereed original research article in a scientific journal
Whatever happened to the progenitors of supernovae 2008cn, 2009kr and 2009md?
Authors: Maund Justyn R., Fraser Morgan, Reilly Emma, Ergon Mattias, Mattila, Seppo
Publication year: 2015
Journal: Monthly Notices of the Royal Astronomical Society
Volume: 447
Issue: 4
First page : 3207
Last page: 3217
Number of pages: 11
ISSN: 0035-8711
DOI: https://doi.org/10.1093/mnras/stu2658
Web address : http://adsabs.harvard.edu/abs/2015MNRAS.447.3207M
We present new late-time, high-resolution observations of the sites of supernovae (SNe) 2008cn, 2009kr and 2009md, acquired with the Hubble Space Telescope. In all instances, significant flux from the SNe is still recovered at late times. We show that the previous identification of the progenitor of SN 2008cn was actually a blend of two sources, whose locations are resolved in these new observations. We suggest that the progenitor of SN 2008cn was actually a red supergiant with Minit < 16 M⊙. In the late-time observations of SN 2009kr, we find that the pre-explosion source (previously thought to be a yellow supergiant) is most probably a small compact cluster with mass ˜6000 M⊙. In late-time F814W observations of the site of SN 2009md, we find a single point source with identical brightness to the pre-explosion source, suggesting some caution in assuming that the pre-explosion source was the progenitor.