Explosion Mechanisms of Core-Collapse Supernovae
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TLDR
The neutrino-heating mechanism, aided by nonradial flows, drives explosions, albeit low-energy ones, of ONeMg-core and some Fe-core progenitors as discussed by the authors.Abstract:
Supernova theory, numerical and analytic, has made remarkable progress in the past decade. This progress was made possible by more sophisticated simulation tools, especially for neutrino transport, improved microphysics, and deeper insights into the role of hydrodynamic instabilities. Violent, large-scale nonradial mass motions are generic in supernova cores. The neutrino-heating mechanism, aided by nonradial flows, drives explosions, albeit low-energy ones, of ONeMg-core and some Fe-core progenitors. The characteristics of the neutrino emission from new-born neutron stars were revised, new features of the gravitational-wave signals were discovered, our notion of supernova nucleosynthesis was shattered, and our understanding of pulsar kicks and explosion asymmetries was significantly improved. But simulations also suggest that neutrino-powered explosions might not explain the most energetic supernovae and hypernovae, which seem to demand magnetorotational driving. Now that modeling is being advanced from two to three dimensions, more realism, new perspectives, and hopefully answers to long-standing questions are coming into reach.read more
Citations
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Journal ArticleDOI
Multidimensional Boltzmann Neutrino Transport Code in Full General Relativity for Core-collapse Simulations
Ryuichiro Akaho,Akira Harada,Hiroki Nagakura,Kohsuke Sumiyoshi,Wakana Iwakami,Hirotada Okawa,Shun Furusawa,Hideo Matsufuru,Shoichi Yamada +8 more
TL;DR: In this article, a neutrino transfer code for core-collapse simulations was developed, which directly solves the multidimensional Boltzmann equations in full general relativity. But the code is not suitable for corecollapse supernova simulations.
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Constraining the supersaturation density equation of state from core-collapse supernova simulations - Excluded volume extension of the baryons
TL;DR: In this paper, the role of supersaturation density equation of state (EOS) is explored in simulations of failed core-collapse supernova explosions, and the nuclear EOS is extended via a one-parameter excluded volume description for baryons, taking into account their finite and increasing volume with increasing density in excess of saturation density.
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Impact of rotation on stellar models
Georges Meynet,André Maeder,Patrick Eggenberger,Sylvia Ekström,Cyril Georgy,Cristina Chiappini,Giovanni Privitera,Arthur Choplin +7 more
TL;DR: In this paper, the links between magnetic fields and rotation were discussed, and the impact of rotation on the age determination of clusters was discussed. But the authors focused on the early chemical evolution of the Milky Way and the origin of the Carbon-Enhanced-Metal-poor stars.
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Matter Effects on Neutrino Oscillations in Different Supernova Models
TL;DR: In this paper, the survival probability and conversion probability of the neutrino transfer through the supernova matter from an initial flavor eigenstate located at the core of a supernova were derived based on the data of density in three different supernova models obtained from simulations.
References
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Presupernova Evolution of Differentially Rotating Massive Stars Including Magnetic Fields
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