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
MATTER MIXING IN ASPHERICAL CORE-COLLAPSE SUPERNOVAE: A SEARCH FOR POSSIBLE CONDITIONS FOR CONVEYING 56Ni INTO HIGH VELOCITY REGIONS
Masaomi Ono,Shigehiro Nagataki,Hirotaka Ito,Shiu-Hang Lee,Jirong Mao,Masa-aki Hashimoto,Alexey Tolstov +6 more
TL;DR: In this article, two-dimensional axisymmetric hydrodynamic simulations of matter mixing in aspherical core-collapse supernova explosions of a 16.3 M star with a compact hydrogen envelope were performed.
Journal ArticleDOI
On the Occurrence of Crossings between the Angular Distributions of Electron Neutrinos and Antineutrinos in the Supernova Core
Shashank Shalgar,Irene Tamborra +1 more
TL;DR: In this paper, a stationary and spherically symmetric SN toy-model is constructed to reproduce the development of the neutrino angular distributions in the dense SN core in the absence of perturbations induced by hydrodynamical instabilities.
Journal ArticleDOI
Closer view of the IGR J11014-6103 outflows
Lucia Pavan,G. Pühlhofer,P. Bordas,Marc Audard,Matteo Balbo,Enrico Bozzo,Dominique Eckert,Carlo Ferrigno,Miroslav Filipovic,Miguel Verdugo,R. Walter +10 more
TL;DR: In this paper, a new deep 250 ks Chandra observation of the Lighthouse Nebula was obtained and detailed spatial and spectral analysis of all X-ray components of the system was performed.
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Relativistic Jets in Core-collapse Supernovae
TL;DR: In this paper, the authors present observational evidence that indicates that choked jets are active in core-collapse supernovae that are not associated with gamma-ray bursts (GRBs).
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Failure of a neutrino-driven explosion after core-collapse may lead to a thermonuclear supernova
Doron Kushnir,Boaz Katz +1 more
TL;DR: In this paper, a series of one-dimensional (1D) calculations of collapsing massive stars with simplified initial density profiles (similar to the results of stellar evolution calculations) and various compositions were performed, assuming that the neutrinos escaped with a negligible effect on the outer layers of the star.
References
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