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 development of explosions in axisymmetric ab initio core-collapse supernova simulations of 12–25 M⊙ stars
Stephen W. Bruenn,Eric J. Lentz,Eric J. Lentz,W. Raphael Hix,W. Raphael Hix,Anthony Mezzacappa,Anthony Mezzacappa,J. Austin Harris,O. E. Bronson Messer,O. E. Bronson Messer,O. E. Bronson Messer,Eirik Endeve,Eirik Endeve,John M. Blondin,Merek A. Chertkow,Eric J. Lingerfelt,Pedro Marronetti,Konstantin N. Yakunin,Konstantin N. Yakunin +18 more
TL;DR: In this article, four axisymmetric core-collapse supernova simulations were presented from 12, 15, 20, and 25 M−1 main sequence progenitors.
Journal ArticleDOI
Neutrino-driven explosion of a 20 solar-mass star in three dimensions enabled by strange-quark contributions to neutrino-nucleon scattering
TL;DR: In this paper, it was shown that a moderate strangeness-dependent contribution of g_a^s = -0.2 to the axial-vector coupling constant gǫ = 1.26 can turn an unsuccessful three-dimensional (3D) model into a successful explosion.
Journal ArticleDOI
Non-Radial Instabilities and Progenitor Asphericities in Core-Collapse Supernovae
Bernhard Müller,H.-Th. Janka +1 more
TL;DR: In this article, the effects of velocity and density perturbations in the progenitor for different perturbation geometries that obey fundamental physical constraints (like the anelastic condition) were investigated in depth using 42 relativistic 2D simulations with multi-group neutrino transport.
Journal ArticleDOI
The Role of Turbulence in Neutrino-Driven Core-Collapse Supernova Explosions
TL;DR: In this paper, the postbounce supernova evolution in a 15-M_⊙ progenitor star was studied with a three-species neutrino and the results indicated that the effective turbulent ram pressure on the shock plays a crucial role by allowing multi-dimensional models to explode with a lower post-shock thermal pressure and thus with less neutrinos heating than 1D models.
Journal ArticleDOI
Three-dimensional simulations of core-collapse supernovae: from shock revival to shock breakout
TL;DR: In this article, three-dimensional hydrodynamic simulations of the evolution of core-collapse supernovae (SN) from blast-wave initiation by the neutrino-driven mechanism to shock breakout from the stellar surface are presented.
References
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