The massive progenitor of the type II-linear supernova 2009kr

Nancy Elias-Rosa, Schuyler D. Van Dyk, Weidong Li, Adam A. Miller, Jeffrey M. Silverman, Mohan Ganeshalingam, Andrew F. Boden, Mansi M. Kasliwal, József Vinkó, Jean Charles Cuillandre, Alexei V. Filippenko, Thea N. Steele, Joshua S. Bloom, Christopher V. Griffith, Io K.W. Kleiser, Ryan J. Foley

Research output: Contribution to journalArticlepeer-review

Abstract

We present early-time photometric and spectroscopic observations of supernova (SN) 2009kr in NGC 1832. We find that its properties to date support its classification as Type II-linear (SN II-L), a relatively rare subclass of core-collapse supernovae (SNe). We have also identified a candidate for the SN progenitor star through comparison of pre-explosion, archival images taken with WFPC2 on board the Hubble Space Telescope with SN images obtained using adaptive optics plus NIRC2 on the 10 m Keck-II telescope. Although the host galaxy's substantial distance (∼26 Mpc) results in large uncertainties in the relative astrometry, we find that if this candidate is indeed the progenitor, it is a highly luminous (M0V = -7.8 mag) yellow supergiant with initial mass ∼18-24 M. This would be the first time that an SN II-L progenitor has been directly identified. Its mass may be a bridge between the upper initial mass limit for the more common Type II-plateau SNe and the inferred initial mass estimate for one Type II-narrow SN.

Original languageEnglish (US)
Pages (from-to)L254-L259
JournalAstrophysical Journal Letters
Volume714
Issue number2 PART 2
DOIs
StatePublished - 2010

Keywords

  • Galaxies: individual (NGC 1832)
  • Stars: evolution
  • Supernovae: general
  • Supernovae: individual (SN 2009kr)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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