Gilmer, MS and Kozyreva, A and Hirschi, R and Fröhlich, C and Yusof, N (2017) Pair-instability Supernova Simulations: Progenitor Evolution, Explosion, and Light Curves. Astrophysical Journal, 846 (2). 100 - 100. ISSN 0004-637X

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Abstract

In recent years, the viability of the pair-instability supernova (PISN) scenario for explaining superluminous supernovae has all but disappeared except for a few slowly-evolving examples. However, PISNe are not predicted to be superluminous throughout the bulk of their mass range. In fact, it is more likely that the first PISN we see (if we have not seen one already) will not be superluminous. Here, we present hydrodynamic simulations of PISNe for four stellar models with unique envelope properties spanning the PISN mass range. In addition, we compute synthetic light curves (LCs) for comparison with current and future observations. We also investigate, in the context of our most massive model, the prospect of mixing in the supernova ejecta, alleviating discrepancies between current PISN models and the remaining superluminous candidate events. To this end, we present the first published 3D hydrodynamic simulations of PISNe. After achieving convergence between 1D, 2D, and 3D simulations, we examine mixing in the supernova ejecta and its affect on the bolometric LC. We observe slight deviations from spherical symmetry, which increase with the number of dimensions. We find no significant effects on the bolometric LC; however, we conclude that mixing between the silicon and oxygen rich layers caused by the Rayleigh–Taylor instability may affect spectra.

Item Type: Article
Additional Information: © IOP Sciences, American Astronomical Society. This is the final published version of the article (version of record). It first appeared online via IOP Science at https://doi.org/10.3847/1538-4357/aa8461 - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: hydrodynamics, radiative transfer, stars, evolution, interiors, massive, supernovae, general
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Depositing User: Symplectic
Date Deposited: 15 Sep 2017 09:31
Last Modified: 15 Sep 2017 10:33
URI: http://eprints.keele.ac.uk/id/eprint/4017

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