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Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 4(439), p. 3694-3703

DOI: 10.1093/mnras/stu221

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The nebular spectra of SN 2012aw and constraints on stellar nucleosynthesis from oxygen emission lines

Journal article published in 2013 by A. Jerkstrand, S. J. Smartt, M. Fraser ORCID, C. Fransson, J. Sollerman, F. Taddia, R. Kotak ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We present nebular phase optical and near-infrared spectroscopy of the Type IIP supernova SN 2012aw combined with NLTE radiative transfer calculations applied to ejecta from stellar evolution/explosion models. Our spectral synthesis models generally show good agreement with the ejecta from a MZAMS = 15 Msun progenitor star. The emission lines of oxygen, sodium, and magnesium are all consistent with the nucleosynthesis in a progenitor in the 14 - 18 Msun range. We also demonstrate how the evolution of the oxygen cooling lines of [O I] 5577 A, [O I] 6300 A, and [O I] 6364 A can be used to constrain the mass of oxygen in the non-molecularly cooled ashes to 20 Msun progenitor. ; Comment: Accepted for publication in MNRAS