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Title: Synthetic Spectra of Pair-instability Supernovae in 3D

Abstract

Pair-instability supernovae (PISNe) may signal the deaths of extremely massive stars in the local Universe or massive primordial stars after the end of the Cosmic Dark Ages. Hydrodynamic simulations of these explosions, performed in 1D, 2D, and 3D geometry, have revealed the strong dependence of mixing in the PISN ejecta on dimensionality. This chemical rearrangement is mainly driven by Rayleigh–Taylor instabilities that start to grow shortly after the collapse of the carbon–oxygen core. We report on the effects of such mixing on the spectroscopic evolution of PISNe by post-processing explosion profiles with the radiation diffusion-equilibrium code SNEC and the implicit Monte Carlo–discrete diffusion Monte Carlo radiation transport code SuperNu. The first 3D radiation transport calculation of a PISN explosion is presented, yielding viewing-angle-dependent synthetic spectra and light curves. Our findings show that while 2D and 3D mixing does not significantly affect the light curves of PISNe, their spectroscopic and color evolution are impacted. Strong features of intermediate-mass elements dominated by silicon, magnesium, and oxygen appear at different phases and reach different intensities depending on the extent of mixing in the silicon/oxygen interface of the PISN ejecta. In contrast, we do not find a significant dependence of PISN light curves andmore » spectra on viewing angle. These results showcase the capabilities of SuperNu to handle 3D radiation transport and highlight the importance of modeling time series of spectra in identifying PISNe with future missions.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1544735
Report Number(s):
LA-UR-19-21458
Journal ID: ISSN 1538-4357
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 875; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; numerical; radiative transfer; supernovae

Citation Formats

Chatzopoulos, E., Gilmer, Matthew Stonecipher, Wollaeger, Ryan Thomas, Fröhlich, Carla, and Even, Wesley Paul. Synthetic Spectra of Pair-instability Supernovae in 3D. United States: N. p., 2019. Web. doi:10.3847/1538-4357/ab1082.
Chatzopoulos, E., Gilmer, Matthew Stonecipher, Wollaeger, Ryan Thomas, Fröhlich, Carla, & Even, Wesley Paul. Synthetic Spectra of Pair-instability Supernovae in 3D. United States. https://doi.org/10.3847/1538-4357/ab1082
Chatzopoulos, E., Gilmer, Matthew Stonecipher, Wollaeger, Ryan Thomas, Fröhlich, Carla, and Even, Wesley Paul. Wed . "Synthetic Spectra of Pair-instability Supernovae in 3D". United States. https://doi.org/10.3847/1538-4357/ab1082. https://www.osti.gov/servlets/purl/1544735.
@article{osti_1544735,
title = {Synthetic Spectra of Pair-instability Supernovae in 3D},
author = {Chatzopoulos, E. and Gilmer, Matthew Stonecipher and Wollaeger, Ryan Thomas and Fröhlich, Carla and Even, Wesley Paul},
abstractNote = {Pair-instability supernovae (PISNe) may signal the deaths of extremely massive stars in the local Universe or massive primordial stars after the end of the Cosmic Dark Ages. Hydrodynamic simulations of these explosions, performed in 1D, 2D, and 3D geometry, have revealed the strong dependence of mixing in the PISN ejecta on dimensionality. This chemical rearrangement is mainly driven by Rayleigh–Taylor instabilities that start to grow shortly after the collapse of the carbon–oxygen core. We report on the effects of such mixing on the spectroscopic evolution of PISNe by post-processing explosion profiles with the radiation diffusion-equilibrium code SNEC and the implicit Monte Carlo–discrete diffusion Monte Carlo radiation transport code SuperNu. The first 3D radiation transport calculation of a PISN explosion is presented, yielding viewing-angle-dependent synthetic spectra and light curves. Our findings show that while 2D and 3D mixing does not significantly affect the light curves of PISNe, their spectroscopic and color evolution are impacted. Strong features of intermediate-mass elements dominated by silicon, magnesium, and oxygen appear at different phases and reach different intensities depending on the extent of mixing in the silicon/oxygen interface of the PISN ejecta. In contrast, we do not find a significant dependence of PISN light curves and spectra on viewing angle. These results showcase the capabilities of SuperNu to handle 3D radiation transport and highlight the importance of modeling time series of spectra in identifying PISNe with future missions.},
doi = {10.3847/1538-4357/ab1082},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 875,
place = {United States},
year = {Wed Apr 24 00:00:00 EDT 2019},
month = {Wed Apr 24 00:00:00 EDT 2019}
}

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text, January 2007


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text, January 2009


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text, January 2010


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text, January 2010


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text, January 2011


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text, January 2012


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text, January 2012


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text, January 2013


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text, January 2013


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text, January 2014


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text, January 2014


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text, January 2014


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preprint, January 2016


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text, January 2018


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text, January 2003


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text, January 1997


Works referencing / citing this record:

Detecting strongly lensed supernovae at z ∼ 5–7 with LSST
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