The Role of Doubly Diffusive Instabilities in the Core-Collapse Supernova Mechanism

1996 ◽  
Vol 458 (2) ◽  
Author(s):  
Stephen W. Bruenn ◽  
Tamara Dineva
Keyword(s):  
Core Collapse ◽  
Core Collapse Supernova ◽  
The Core

scholarly journals A shallow water analogue of asymmetric core-collapse, and neutron star kick/spin

2011 ◽  
Vol 7 (S279) ◽  
pp. 134-137
Author(s):  
Thierry Foglizzo ◽  
Frédéric Masset ◽  
Jérôme Guilet ◽  
Gilles Durand
Keyword(s):  
Neutron Star ◽  
Shallow Water ◽  
Acoustic Waves ◽  
Large Scale ◽  
Massive Stars ◽  
Core Collapse ◽  
Hydraulic Jumps ◽  
Core Collapse Supernova ◽  
Accretion Shock

AbstractMassive stars end their life with the gravitational collapse of their core and the formation of a neutron star. Their explosion as a supernova depends on the revival of a spherical accretion shock, located in the inner 200km and stalled during a few hundred milliseconds. Numerical simulations suggest that the large scale asymmetry of the neutrino-driven explosion is induced by a hydrodynamical instability named SASI. Its non radial character is able to influence the kick and the spin of the resulting neutron star. The SWASI experiment is a simple shallow water analog of SASI, where the role of acoustic waves and shocks is played by surface waves and hydraulic jumps. Distances in the experiment are scaled down by a factor one million, and time is slower by a factor one hundred. This experiment is designed to illustrate the asymmetric nature of core-collapse supernova.

scholarly journals The core collapse supernova rate from 24 years of data of the Large Volume Detector

2017 ◽  
Vol 888 ◽  
pp. 012256 ◽  
Author(s):  
G. Bruno ◽  
W. Fulgione ◽  
A. Molinario ◽  
C. Vigorito ◽  
Keyword(s):  
Large Volume ◽  
Core Collapse ◽  
Core Collapse Supernova ◽  
The Core ◽  
Large Volume Detector

scholarly journals THE CORE COLLAPSE SUPERNOVA RATE FROM THE SDSS-II SUPERNOVA SURVEY

2014 ◽  
Vol 792 (2) ◽  
pp. 135 ◽  
Author(s):  
Matt Taylor ◽  
David Cinabro ◽  
Ben Dilday ◽  
Lluis Galbany ◽  
Ravi R. Gupta ◽  
...  
Keyword(s):  
Core Collapse ◽  
Core Collapse Supernova ◽  
The Core

scholarly journals Thoughts on Core-Collapse Supernova Theory

2007 ◽  
Vol 3 (S250) ◽  
pp. 185-192 ◽  
Author(s):  
Adam Burrows ◽  
Luc Dessart ◽  
Christian D. Ott ◽  
Eli Livne ◽  
Jeremiah Murphy
Keyword(s):  
Spherical Symmetry ◽  
State Of The Art ◽  
Core Collapse ◽  
Core Collapse Supernova ◽  
The Core ◽  
Heating Mechanism ◽  
Numerical Tools ◽  
Computational Resources ◽  
Do So

AbstractAn emerging conclusion of theoretical supernova research is that the breaking of spherical symmetry may be the key to the elusive mechanism of explosion. Such explorations require state-of-the-art multi-dimensional numerical tools and significant computational resources. Despite the thousands of man-years and thousands of CPU-years devoted to date to studying the supernova mystery, both require further evolution. There are many computationally-challenging instabilities in the core, before, during, and after the launch of the shock, and a variety of multi-dimensional mechanisms are now being actively explored. These include the neutrino heating mechanism, the MHD jet mechanism, and an acoustic mechanism. The latter is the most controversial, and, as with all the contenders, requires detailed testing and scrutiny. In this paper, we analyze recent attempts to do so, and suggests methods to improve them.

scholarly journals Three-dimensional models of core-collapse supernovae from low-mass progenitors with implications for Crab

2020 ◽  
Vol 496 (2) ◽  
pp. 2039-2084 ◽  
Author(s):  
G Stockinger ◽  
H-T Janka ◽  
D Kresse ◽  
T Melson ◽  
T Ertl ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Iron Core ◽  
Core Collapse ◽  
Crab Pulsar ◽  
Core Collapse Supernova ◽  
Spin Period ◽  
The Core ◽  
Low Mass ◽  
Catch Up ◽  
Three Dimensional Models

ABSTRACT We present 3D full-sphere supernova simulations of non-rotating low-mass (∼9 M⊙) progenitors, covering the entire evolution from core collapse through bounce and shock revival, through shock breakout from the stellar surface, until fallback is completed several days later. We obtain low-energy explosions (∼0.5–1.0 × 1050 erg) of iron-core progenitors at the low-mass end of the core-collapse supernova (LMCCSN) domain and compare to a super-AGB (sAGB) progenitor with an oxygen–neon–magnesium core that collapses and explodes as electron-capture supernova (ECSN). The onset of the explosion in the LMCCSN models is modelled self-consistently using the vertex-prometheus code, whereas the ECSN explosion is modelled using parametric neutrino transport in the prometheus-HOTB code, choosing different explosion energies in the range of previous self-consistent models. The sAGB and LMCCSN progenitors that share structural similarities have almost spherical explosions with little metal mixing into the hydrogen envelope. A LMCCSN with less second dredge-up results in a highly asymmetric explosion. It shows efficient mixing and dramatic shock deceleration in the extended hydrogen envelope. Both properties allow fast nickel plumes to catch up with the shock, leading to extreme shock deformation and aspherical shock breakout. Fallback masses of $\mathord {\lesssim }\, 5\, \mathord {\times }\, 10^{-3}$ M⊙ have no significant effects on the neutron star (NS) masses and kicks. The anisotropic fallback carries considerable angular momentum, however, and determines the spin of the newly born NS. The LMCCSN model with less second dredge-up results in a hydrodynamic and neutrino-induced NS kick of >40 km s−1 and a NS spin period of ∼30 ms, both not largely different from those of the Crab pulsar at birth.

The possibility of r-process in the core-collapse supernova of an ONeMg core

2003 ◽  
Vol 718 ◽  
pp. 638-640 ◽  
Author(s):  
M. Tamamura ◽  
S. Wanajo ◽  
N. Itoh ◽  
K. Nomoto ◽  
S. Nozawa
Keyword(s):  
Core Collapse ◽  
Core Collapse Supernova ◽  
The Core ◽  
R Process

MAGNETO-PLASMA PROCESSES IN RELATIVISTIC ASTROPHYSICS: MODERN DEVELOPMENTS

2013 ◽  
Vol 22 (07) ◽  
pp. 1330016
Author(s):  
OLEG YU. TSUPKO
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Gravitational Lensing ◽  
Crucial Role ◽  
Compact Objects ◽  
Relativistic Astrophysics ◽  
Core Collapse ◽  
Core Collapse Supernova ◽  
Supernova Explosions

This contribution is a review of some talks presented at the session "Magneto-Plasma Processes in Relativistic Astrophysics" of the Thirteenth Marcel Grossmann Meeting MG13. We discuss the modern developments of relativistic astrophysics, connected with presence of plasma and magnetic fields. The influence of magneto-plasma processes on the structure of the compact objects and accretion processes is considered. We also discuss a crucial role of magnetic field for the mechanism of core-collapse supernova explosions. Gravitational lensing in plasma is also considered.

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