Three-dimensional delayed-detonation models with nucleosynthesis for type ia supernovae

Ivo R. Seitenzahl, Franco Ciaraldi-Schoolmann, Friedrich K. R̈opke, Michael Fink, Wolfgang Hillebrandt, Markus Kromer, Rudiger Pakmor, Ashley J. Ruiter, Stuart A. Sim, Stefan Taubenberger

Research output: Contribution to journalArticlepeer-review

254 Citations (Scopus)

Abstract

We present results for a suite of 14 three-dimensional, high-resolution hydrodynamical simulations of delayed-detonation models of Type Ia supernova (SN Ia) explosions. This model suite comprises the first set of three-dimensional SN Ia simulations with detailed isotopic yield information. As such, it may serve as a data base for Chandrasekhar-mass delayed-detonation model nucleosynthetic yields and for deriving synthetic observables such as spectra and light curves. We employ aphysically motivated, stochastic model based on turbulent velocity fluctuations and fuel density to calculate in situ the deflagration-to-detonation transition probabilities. To obtain different strengths of the deflagration phase and thereby different degrees of pre-expansion, we have chosen a sequence of initial models with 1, 3, 5, 10, 20, 40, 100, 150, 200, 300 and 1600 (two different realizations) ignition kernels in a hydrostatic white dwarf with a central density of 2.9 × 10 g cm, as well as one high central density (5.5 × 10 g cm) and one low central density (1.0 × 10 g cm) rendition of the 100 ignition kernel configuration. For each simulation, we determined detailed nucleosynthetic yields by postprocessing10 tracer particles with a 384 nuclide reaction network. All delayed-detonation models result in explosions unbinding thewhite dwarf, producing a range of 56Ni masses from 0.32 to 1.11M. As a general trend, the models predict that the stableneutron-rich iron-group isotopes are not found at the lowest velocities, but rather at intermediate velocities (~3000×10 000 km s) in a shell surrounding a Ni-rich core. The models further predict relatively low-velocity oxygen and carbon, with typical minimum velocities around 4000 and 10 000 km s, respectively.
Original languageEnglish
Pages (from-to)1156-1172
Number of pages17
JournalMonthly Notices of the Royal Astronomical Society
Volume429
Issue number2
Early online date05 Dec 2012
DOIs
Publication statusPublished - 21 Feb 2013

Bibliographical note

Copyright 2013 Elsevier B.V., All rights reserved.

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