The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?

M. Hicken; P. M. Garnavich; J. L. Prieto; S. Blondin; D. L. DePoy; R. P. Kirshner; J. Parrent

doi:10.1086/523301

The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?

Astrophysics 2009-11-13 v1

Authors: M. Hicken , P. M. Garnavich , J. L. Prieto , S. Blondin , D. L. DePoy , R. P. Kirshner , J. Parrent

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Abstract

Spectra and light curves of SN 2006gz show the strongest signature of unburned carbon and one of the slowest fading light curves ever seen in a type Ia event (Delta m_15 = 0.69 +/- 0.04). The early-time Si II velocity is low, implying it was slowed by an envelope of unburned material. Our best estimate of the luminosity implies M_V = -19.74 and the production of ~ 1.2 M_sun of 56Ni. This suggests a super-Chandrasekhar mass progenitor. A double degenerate merger is consistent with these observations.

Keywords

supernova 2006gz type Ia supernova unburned carbon light curve double degenerate merger super-Chandrasekhar mass 56Ni production

Cite

@article{arxiv.0709.1501,
  title  = {The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?},
  author = {M. Hicken and P. M. Garnavich and J. L. Prieto and S. Blondin and D. L. DePoy and R. P. Kirshner and J. Parrent},
  journal= {arXiv preprint arXiv:0709.1501},
  year   = {2009}
}

Comments

Accepted for publication in ApJL (5 pages, 4 figures). UBVr'i' light curves, UVOIR light curves, and spectra available at http://www.cfa.harvard.edu/supernova/SN2006gz

The Luminous and Carbon-Rich Supernova 2006gz: A Double Degenerate Merger?

Abstract

Keywords

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