Kozyreva, A, Gilmer, M, Hirschi, R, Frohlich, C, Blinnikov, S, Wollaeger, R, Noebauer, U, van Rossum, D, Heger, A, Even, W, Waldman, R, Tolstov, A, Chatzopoulos, E and Sorokina, E (2017) Fast evolving pair-instability supernova models: evolution, explosion, light curves. Monthly Notices of the Royal Astronomical Society, 464 (3). pp. 2854-2865.

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Abstract

With an increasing number of superluminous supernovae (SLSNe) discovered, the question of their origin remains open and causes heated debates in the supernova community. Currently, there are three proposed mechanisms for SLSNe: (1) pair-instability supernovae (PISNe), (2) magnetar-driven supernovae and (3) models in which the supernova ejecta interacts with a circumstellar material ejected before the explosion. Based on current observations of SLSNe, the PISN origin has been disfavoured for a number of reasons. Many PISN models provide overly broad light curves and too reddened spectra, because of massive ejecta and a high amount of nickel. In the current study, we re-examine PISN properties using progenitor models computed with the GENEC code. We calculate supernova explosions with FLASH and light-curve evolution with the radiation hydrodynamics code STELLA. We find that high-mass models (200 and 250 M⊙) at relatively high metallicity (Z = 0.001) do not retain hydrogen in the outer layers and produce relatively fast evolving PISNe Type I and might be suitable to explain some SLSNe. We also investigate uncertainties in light-curve modelling due to codes, opacities, the nickel-bubble effect and progenitor structure and composition.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Uncontrolled Keywords: radiative transfer, stars, evolution, massive, supernovae, general, indivdual, PTF12dam
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Depositing User: Symplectic
Date Deposited: 23 Nov 2016 11:53
Last Modified: 03 Apr 2019 09:36
URI: http://eprints.keele.ac.uk/id/eprint/2518

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