Constraining the physical properties of Type II-Plateau supernovae using nebular phase spectra

K. Maguire; A. Jerkstrand; S.J. Smartt; C. Fransson; A. Pastorello; S. Benetti; S. Valenti; F. Bufano; Georgios Leloudas

doi:10.1111/j.1365-2966.2011.20276.x

Constraining the physical properties of Type II-Plateau supernovae using nebular phase spectra

K. Maguire, A. Jerkstrand, S.J. Smartt, C. Fransson, A. Pastorello, S. Benetti, S. Valenti, F. Bufano, Georgios Leloudas

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Abstract

We present a study of the nebular phase spectra of a sample of Type II-Plateau supernovae with identified progenitors or restrictive limits. The evolution of line fluxes, shapes and velocities is compared within the sample, and interpreted by the use of a spectral synthesis code. The small diversity within the data set can be explained by strong mixing occurring during the explosion, and by recognizing that most lines have significant contributions from primordial metals in the H envelope, which dominates the total ejecta mass in these types of objects. In particular, when using the [Oi] 6300, 6364Å doublet for estimating the core mass of the star, care has to be taken to account for emission from primordial O in the envelope. Finally, a correlation between the Hα line width and the mass of ⁵⁶Ni is presented, suggesting that higher energy explosions are associated with higher ⁵⁶Ni production.

Original language	English
Journal	Monthly Notices of the Royal Astronomical Society
Volume	420
Issue number	4
Pages (from-to)	3451-3468
Number of pages	17
ISSN	0035-8711
DOIs	https://doi.org/10.1111/j.1365-2966.2011.20276.x
Publication status	Published - 1 Mar 2012

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title = "Constraining the physical properties of Type II-Plateau supernovae using nebular phase spectra",

abstract = "We present a study of the nebular phase spectra of a sample of Type II-Plateau supernovae with identified progenitors or restrictive limits. The evolution of line fluxes, shapes and velocities is compared within the sample, and interpreted by the use of a spectral synthesis code. The small diversity within the data set can be explained by strong mixing occurring during the explosion, and by recognizing that most lines have significant contributions from primordial metals in the H envelope, which dominates the total ejecta mass in these types of objects. In particular, when using the [Oi] 6300, 6364{\AA} doublet for estimating the core mass of the star, care has to be taken to account for emission from primordial O in the envelope. Finally, a correlation between the Hα line width and the mass of 56Ni is presented, suggesting that higher energy explosions are associated with higher 56Ni production.",

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T1 - Constraining the physical properties of Type II-Plateau supernovae using nebular phase spectra

AU - Maguire, K.

AU - Jerkstrand, A.

AU - Smartt, S.J.

AU - Fransson, C.

AU - Pastorello, A.

AU - Benetti, S.

AU - Valenti, S.

AU - Bufano, F.

AU - Leloudas, Georgios

PY - 2012/3/1

Y1 - 2012/3/1

N2 - We present a study of the nebular phase spectra of a sample of Type II-Plateau supernovae with identified progenitors or restrictive limits. The evolution of line fluxes, shapes and velocities is compared within the sample, and interpreted by the use of a spectral synthesis code. The small diversity within the data set can be explained by strong mixing occurring during the explosion, and by recognizing that most lines have significant contributions from primordial metals in the H envelope, which dominates the total ejecta mass in these types of objects. In particular, when using the [Oi] 6300, 6364Å doublet for estimating the core mass of the star, care has to be taken to account for emission from primordial O in the envelope. Finally, a correlation between the Hα line width and the mass of 56Ni is presented, suggesting that higher energy explosions are associated with higher 56Ni production.

AB - We present a study of the nebular phase spectra of a sample of Type II-Plateau supernovae with identified progenitors or restrictive limits. The evolution of line fluxes, shapes and velocities is compared within the sample, and interpreted by the use of a spectral synthesis code. The small diversity within the data set can be explained by strong mixing occurring during the explosion, and by recognizing that most lines have significant contributions from primordial metals in the H envelope, which dominates the total ejecta mass in these types of objects. In particular, when using the [Oi] 6300, 6364Å doublet for estimating the core mass of the star, care has to be taken to account for emission from primordial O in the envelope. Finally, a correlation between the Hα line width and the mass of 56Ni is presented, suggesting that higher energy explosions are associated with higher 56Ni production.

U2 - 10.1111/j.1365-2966.2011.20276.x

DO - 10.1111/j.1365-2966.2011.20276.x

M3 - Journal article

SN - 0035-8711

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SP - 3451

EP - 3468

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

IS - 4

ER -

Constraining the physical properties of Type II-Plateau supernovae using nebular phase spectra

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