Three-dimensional delayed-detonation models with nucleosynthesis for Type Ia supernovae
Ivo R. Seitenzahl,F. Ciaraldi-Schoolmann,Friedrich K. Röpke,M. Fink,Wolfgang Hillebrandt,Markus Kromer,Rüdiger Pakmor,Ashley J. Ruiter,Stuart A. Sim,Stefan Taubenberger +9 more
TLDR
In this article, a suite of fourteen three-dimensional, high-resolution hydrodynamical simulations of delayed-detonation models of Type Ia supernova (SN Ia) explosions is presented.Abstract:
We present results for a suite of fourteen 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 I a simulations with detailed isotopic yield information. As such, it may serve as a database for Chandrasekhar-mass delayeddetonation model nucleosynthetic yields and for deriving synthetic observables such as spectra and light curves. We employ a physically motivated, stochastic model based on turbulent velocity fluctuations and fuel density to calculate in situ t he deflagration to detonation transition (DDT) 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 central density of 2.9× 10 9 g cm −3 , plus in addition one high central density (5.5× 10 9 g cm −3 ) and one low central density (1.0× 10 9 g cm −3 ) rendition of the 100 ignition kernel configuration. For each simulatio n we determined detailed nucleosynthetic yields by post-processing 10 6 tracer particles with a 384 nuclide reaction network. All delayed detonation models result in explosions unbinding the white dwarf, producing a range of 56 Ni masses from 0.32 to 1.11 M⊙. As a general trend, the models predict that the stable neutron-rich iron group isotopes are not found at the lowest velocities, but rather at intermediate velocities (∼3, 000− 10, 000 km s −1 ) in a shell surrounding a 56 Ni-rich core. The models further predict relatively low velocity oxygen and carbon, with typical minimum velocities around 4, 000 and 10, 000 km s −1 , respectively.read more
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Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
TL;DR: In this paper, a grid of supernovae resulting from massive stars with solar metallicity and masses from 9.0 to 120 solar masses are calculated for nucleosynthesis, light curves, explosion energies, and remnant masses.
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Nucleosynthesis in Stars and the Chemical Enrichment of Galaxies
TL;DR: In this article, the authors review the recent results of the nucleosynthesis yields of mainly massive stars for a wide range of stellar masses, metallicities, and explosion energies, and provide yields tables and examine how those yields are affected by some hydrodynamical effe...
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Observational Clues to the Progenitors of Type Ia Supernovae
TL;DR: In this article, the authors review the significant recent observational progress in addressing the progenitor problem and consider clues that have emerged from the observed properties of the various proposed proggenitor populations, from studies of SN Ia sites.
Journal ArticleDOI
Core-Collapse Supernovae from 9 to 120 Solar Masses Based on Neutrino-powered Explosions
TL;DR: In this paper, a grid of supernovae resulting from massive stars with solar metallicity and masses from 9.0 to 120 solar masses are calculated for nucleosynthesis, light curves, explosion energies, and remnant masses.
Journal ArticleDOI
Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for type ia supernovae
M. Fink,Markus Kromer,Ivo R. Seitenzahl,F. Ciaraldi-Schoolmann,Friedrich K. Röpke,Stuart A. Sim,Rüdiger Pakmor,Ashley J. Ruiter,Wolfgang Hillebrandt +8 more
TL;DR: In this article, a set of 3D full-star hydrodynamic explosion models, in which the deflagration strength was parametrized using the multispot ignition approach, were computed for weak and intermediate deflagrations with energy release E-nuc less than or similar to 1.1 x 10(51) erg.
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Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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Measurements of Omega and Lambda from 42 High-Redshift Supernovae
Saul Perlmutter,Greg Aldering,G. Goldhaber,R. A. Knop,Peter Nugent,P. G. Castro,Susana E. Deustua,Sebastien Fabbro,A. Goobar,D. E. Groom,I. M. Hook,A. G. Kim,M. Y. Kim,Julia C. Lee,Nelson J. Nunes,Reynald Pain,C. R. Pennypacker,R. M. Quimby,C. Lidman,Richard S. Ellis,Michael G. Irwin,Richard G. McMahon,P. Ruiz-Lapuente,Nicholas A. Walton,Bradley E. Schaefer,B. J. Boyle,Alexei V. Filippenko,Thomas Matheson,A. S. Fruchter,Nino Panagia,Heidi Jo Newberg,W. J. Couch +31 more
TL;DR: In this paper, the mass density, Omega_M, and cosmological-constant energy density of the universe were measured by the analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology Project.
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Fronts propagating with curvature-dependent speed: algorithms based on Hamilton-Jacobi formulations
Stanley Osher,James A. Sethian +1 more
TL;DR: The PSC algorithm as mentioned in this paper approximates the Hamilton-Jacobi equations with parabolic right-hand-sides by using techniques from the hyperbolic conservation laws, which can be used also for more general surface motion problems.
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