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Spatial distribution of radionuclides in 3D models of SN 1987A and Cas A

Published online by Cambridge University Press:  17 October 2017

Hans-Thomas Janka ,
Michael Gabler  and
Annop Wongwathanarat Open the ORCID record for Annop Wongwathanarat [Opens in a new window]
Hans-Thomas Janka
Affiliation:
Max Planck Institute for Astrophysics, Postfach 1317, D-85741 Garching, Germany email: [email protected]
Michael Gabler
Affiliation:
Max Planck Institute for Astrophysics, Postfach 1317, D-85741 Garching, Germany email: [email protected]
Annop Wongwathanarat
Affiliation:
Max Planck Institute for Astrophysics, Postfach 1317, D-85741 Garching, Germany email: [email protected] RIKEN, Astrophysical Big Bang Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan email: [email protected]
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Abstract

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Fostered by the possibilities of multi-dimensional computational modeling, in particular the advent of three-dimensional (3D) simulations, our understanding of the neutrino-driven explosion mechanism of core-collapse supernovae (SNe) has experienced remarkable progress over the past decade. First self-consistent, first-principle models have shown successful explosions in 3D, and even failed cases may be cured by moderate changes of the microphysics inside the neutron star (NS), better grid resolution, or more detailed progenitor conditions at the onset of core collapse, in particular large-scale perturbations in the convective Si and O burning shells. 3D simulations have also achieved to follow neutrino-driven explosions continuously from the initiation of the blast wave, through the shock breakout from the progenitor surface, into the radioactively powered evolution of the SN, and towards the free expansion phase of the emerging remnant. Here we present results from such simulations, which form the basis for direct comparisons with observations of SNe and SN remnants in order to derive constraints on the still disputed explosion mechanism. It is shown that predictions based on hydrodynamic instabilities and mixing processes associated with neutrino-driven explosions yield good agreement with measured NS kicks, light-curve properties of SN 1987A and asymmetries of iron and 44Ti distributions observed in SN 1987A and Cassiopeia A.

Keywords

supernovae: generalsupernovae: individual (Cassiopeia A, SN1987A)neutrinoshydrodynamicsinstabilitiesnuclear reactionsnucleosynthesisabundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S331: Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths , February 2017 , pp. 148 - 156
Copyright
Copyright © International Astronomical Union 2017 

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