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
The Core-Collapse Supernova Explosion Mechanism
TL;DR: In this paper, the neutrino-driven mechanism of supernova explosion was summarized and the main contenders for a solution were briefly outlined and reviewed by means of multi-dimensional simulations.
Journal ArticleDOI
A DG-IMEX method for two-moment neutrino transport: Nonlinear solvers for neutrino-matter coupling
TL;DR: In this article, the authors design and compare nonlinear iterative solvers for implicit systems with energy coupling neutrino-matter interactions commonly used in core-collapse supernova (CCSN) simulations, where electron neutrinos and antineutrinos interact with static matter configurations through the Bruenn~85 opacity set.
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Spectropolarimetry of stripped-envelope supernovae: observations and modelling.
TL;DR: Observations indicate that stripped-envelope SNe generally have a non-axisymmetric ion distribution in the ejecta, which suggests that large-scale convection or standing accretion shock instability takes place at the onset of the explosion.
Journal ArticleDOI
Nucleosynthesis Constraints on the Energy Growth Timescale of a Core-collapse Supernova Explosion
Ryo Sawada,Keiichi Maeda +1 more
TL;DR: In this paper, the authors employ one-dimensional hydrodynamic and nucleosynthesis simulations above the proto-neutron star core, by parameterizing the nature of the explosion mechanism.
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A Deep Near-Infrared [Fe II]+[Si I] Emission Line Image of the Supernova Remnant Cassiopeia A
Bon-Chul Koo,Hyun-Jeong Kim,Yong-Hyun Lee,John C. Raymond,Jae-Joon Lee,Sung-Chul Yoon,Dae-Sik Moon +6 more
TL;DR: In this paper, the authors presented a long-exposure (~10 hr) image of the supernova (SN) remnant Cassiopeia A (Cas A) obtained with the UKIRT 3.8m telescope using a narrow band filter centered at 1.644 um emission.
References
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