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
Application of the nuclear equation of state obtained by the variational method to core-collapse supernovae
TL;DR: In this paper, the variational equation of state (EOS) for hot asymmetric nuclear matter was applied to spherically symmetric core-collapse supernovae (SNe) with and without neutrino transfer.
Journal ArticleDOI
Strongly Bipolar Inner Ejecta of the Normal Type IIP Supernova ASASSN-16at
Subhash Bose,Subo Dong,Nancy Elias-Rosa,Benjamin J. Shappee,D. Bersier,S. Benetti,Maximilian Stritzinger,Dirk Grupe,Christopher S. Kochanek,J. L. Prieto,Ping Chen,Hanindyo Kuncarayakti,Seppo Mattila,A. Morales-Garoffolo,Nidia Morrell,F. Onori,T. M. Reynolds,Alessandro Siviero,Auni Somero,Krzysztof Z. Stanek,Giacomo Terreran,Todd A. Thompson,L. Tomasella,Chris Ashall,Christa Gall,Mariusz Gromadzki,Thomas W.-S. Holoien +26 more
TL;DR: In this paper, double-peaked nebular Balmer lines have been observed for a type II supernova ASASSN-16at (SN 2016X) in the late-time, nebular-phase spectra.
Journal ArticleDOI
The Temperature and Ionization of Unshocked Ejecta in Cas A
John C. Raymond,Bon-Chul Koo,Yong-Hyun Lee,Dan Milisavljevic,Robert A. Fesen,Igor Chilingarian,Igor Chilingarian +6 more
TL;DR: In this paper, the authors performed NIR spectroscopy on the diffuse emission region and found that the unshocked ejecta emission does not show those lines, but rather the [Si I] 1.607 micron line.
Book ChapterDOI
Neutron stars formation and Core Collapse Supernovae
TL;DR: In this paper, the authors review the current status of core-collapse supernova observations and theoretical modelling, the connection with their progenitor stars, and the properties of the neutron stars left behind.
Journal ArticleDOI
Systematic comparison of initial velocities for neutron stars in different models
TL;DR: In this article, the scale height of the density distribution increases systematically with R in three population models and the distribution of old neutron stars in these population models agrees with the observed structure of the Galaxy in terms of initial velocities (1-D and 3-D), as well as the scale-height distributions.
References
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