Simulations of Magnetically Driven Supernova and Hypernova Explosions in the Context of Rapid Rotation
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In this article, the first 2D rotating, multigroup, radiation magnetohydrodynamics (RMHD) simulations of supernova core collapse, bounce, and explosion were presented.Abstract:
We present here the first 2D rotating, multigroup, radiation magnetohydrodynamics (RMHD) simulations of supernova core collapse, bounce, and explosion. In the context of rapid rotation, we focus on the dynamical effects of magnetic stresses and the creation and propagation of MHD jets. We find that a quasi-steady state can be quickly established after bounce, during which a well-collimated MHD jet is maintained by continuous pumping of power from the differentially rotating core. If the initial spin period of the progenitor core is 2 s, the free energy reservoir in the secularly evolving proto-neutron star is adequate to power a supernova explosion and may be enough for a hypernova. The jets are well collimated by the infalling material and magnetic hoop stresses and maintain a small opening angle. We see evidence of sausage instabilities in the emerging jet stream. Neutrino heating is subdominant in the rapidly rotating models we explore but can contribute 10%-25% to the final explosion energy. Our simulations suggest that even in the case of modest or slow rotation, a supernova explosion might be followed by a secondary, weak MHD jet explosion, which, because of its weakness, may to date have gone unnoticed in supernova debris. Furthermore, we suggest that the generation of a nonrelativistic MHD precursor jet during the early proto-neutron star/supernova phase is implicit in both the collapsar and millisecond magnetar models of GRBs. The multidimensional, multigroup, rapidly rotating RMHD simulations we describe here are a start along the path toward more realistic simulations of the possible role of magnetic fields in some of nature's most dramatic events.read more
Citations
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Journal ArticleDOI
Turbulent magnetic field amplification from spiral sasi modes: implications for core-collapse supernovae and proto-neutron star magnetization
Eirik Endeve,Christian Y. Cardall,Christian Y. Cardall,Reuben D. Budiardja,Samuel Beck,Alborz Bejnood,Ross J. Toedte,Anthony Mezzacappa,Anthony Mezzacappa,John M. Blondin +9 more
TL;DR: In this paper, a suite of higher-resolution idealized models of the post-bounce core-collapse supernova environment is presented, which vary in initial magnetic field strength, rotation rate, and grid resolution.
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Core-Collapse Supernova Explosion Theory
Adam Burrows,David Vartanyan +1 more
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A new multi-energy neutrino radiation-hydrodynamics code in full general relativity and its application to the gravitational collapse of massive stars
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Development of a general relativistic magnetohydrodynamic code and its application to the central engine of long gamma-ray bursts
TL;DR: In this article, the formation of relativistic jets at the center of a progenitor of a gamma-ray burst (GRB) was investigated, and it was shown that a jet is launched from the centre of the progenitors.
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Current status of r -process nucleosynthesis
Toshitaka Kajino,Toshitaka Kajino,Wako Aoki,A. B. Balantekin,Roland Diehl,Roland Diehl,Michael Famiano,Grant J. Mathews +7 more
TL;DR: The rapid neutron capture process ( r-process) is believed to be responsible for about half of the production of the elements heavier than iron and contributes to abundances of some lighter nuclides as well as mentioned in this paper.
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