REVIVAL OF THE STALLED CORE-COLLAPSE SUPERNOVA SHOCK TRIGGERED BY PRECOLLAPSE ASPHERICITY IN THE PROGENITOR STAR

By Sean M. Couch, Christian D. Ott. 2013

154 citations recorded by the source corpus.

Multi-dimensional simulations of advanced nuclear burning stages of massive stars suggest that the Si/O layers of presupernova stars harbor large deviations from the spherical symmetry typically assumed for presupernova stellar structure. We carry out three-dimensional core-collapse supernova simulations with and without aspherical velocity perturbations to assess their potential impact on the supernova hydrodynamics in the stalled-shock phase. Our results show that realistic perturbations can qualitatively alter the postbounce evolution, triggering an explosion in a model that fails to explode without them. This finding underlines the need for a multi-dimensional treatment of the presupernova stage of stellar evolution.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/0895d41b2a9bd650daa4979f94b1acb6e51c394a

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In Astronomy and Astrophysics

Citations in the corpus

THE ROLE OF TURBULENCE IN NEUTRINO-DRIVEN CORE-COLLAPSE SUPERNOVA EXPLOSIONS (2014, methodology): “As in Couch & Ott (2013), we apply non-radial, momentum-preserving velocity perturbations to the otherwise spherically-symmetric initial model.”
A TWO-PARAMETER CRITERION FOR CLASSIFYING THE EXPLODABILITY OF MASSIVE STARS BY THE NEUTRINO-DRIVEN MECHANISM (2015, background): “…2015), and that asymmetries and perturbations in the shell-burning layers of the pre-collapse core might have important consequences for the development of SN explosions by the neutrino-driven mechanism (e.g., Arnett & Meakin 2011; Couch & Ott 2013, 2015; Müller & Janka 2015; Couch et al. 2015).”
Supernova simulations from a 3D progenitor model - Impact of perturbations and evolution of explosion properties (2017, methodology): “5 There is, in fact, some motivation for using this approximation; it is more closely connected to the idea that the ratio of turbulent stresses and the pre- MNRAS 000, 1–22 (0000) and Mgain are higher for stronger initial perturbations during the accretion phase with the exception of brief interval”
What can be learned from a future supernova neutrino detection (2017, background): “difference between whether or not a star explodes [57, 58, 59].”
NEUTRINO-DRIVEN EXPLOSION OF A 20 SOLAR-MASS STAR IN THREE DIMENSIONS ENABLED BY STRANGE-QUARK CONTRIBUTIONS TO NEUTRINO–NUCLEON SCATTERING (2015, background): “Couch & Ott (2013), Couch et al. (2015), and Müller & Janka (2015) indeed confirmed long-standing speculations that large-amplitude perturbations of low-order modes in the convective shell-burning layers (e.g., Arnett & Meakin 2011, and references therein) might facilitate the development of…”
Non-Radial Instabilities and Progenitor Asphericities in Core-Collapse Supernovae (2014, methodology): “The idea of Couch & Ott (2013) certainly has a firm basis in late-stage stellar evolution: Seed asphericities will inevitable be present in the silicon and oxygen shell due to convective burning.”
Science case for the Einstein telescope (2019, background): “The three-flavor neutrino flux emanating from the proto-neutron star could power itself a core collapse supernova via neutrino heating on delayed timescales of order one second [104–116].”
A simple approach to the supernova progenitor–explosion connection (2016, background): “…that boost the turbulent motions behind the shock may still be missing (such as strong seed perturbations from convective burning in the progenitor; Couch & Ott 2013; Couch et al. 2015 ; M¨uller & Janka 2015), Finally, since our ﬁts for the shock radius, and the advection and heating time-scales…”
NEUTRINO-DRIVEN SUPERNOVA OF A LOW-MASS IRON-CORE PROGENITOR BOOSTED BY THREE-DIMENSIONAL TURBULENT CONVECTION (2015, background): “Therefore Abdikamalov et al. (2014) are worried about even less favorable explosion conditions when resolution shortcomings of all current 3D models can be overcome, and Couch & Ott (2013, 2014) advocate precollapse progenitor-core asymmetries as possible solution of the dilemma.”
A successful 3D core-collapse supernova explosion model (2018, background): “It has been shown (Couch & Ott 2013, 2015; Müller & Janka 2015; Müller 2016; Burrows et al. 2018) that if the seeds are of sufficient strength, then the ability of turbulence to ignite explosion is enhanced.”
Three-dimensional simulations of neutrino-driven core-collapse supernovae from low-mass single and binary star progenitors (2018, background): “Recognising the potentially significant role of pre-collapse seed asphericities in the core-collapse supernova explosion mechanism (Couch & Ott 2013; Müller & Janka 2015; Müller et al. 2017a), we simulated the convective burning in the active O shell in 3D for the last few minutes prior to…”
Exploring Fundamentally Three-dimensional Phenomena in High-fidelity Simulations of Core-collapse Supernovae (2018, methodology): “Resulting CCSN mechanism simulations with this 3D progenitor model showed a modest increase in the strength of the explosion, though not the strong qualitative impact found by Couch & Ott (2013).”
The Status of Multi-Dimensional Core-Collapse Supernova Models (2016, methodology): “…new variation of the neutrino-driven mechanism was initially studied by imposing large initial perturbations by hand in leakagebased simulations (Couch & Ott 2013, 2015) and multigroup neutrino hydrodynamics simulations (Müller & Janka 2015); the earlier light-bulb based models of Fernández…”
THE LANDSCAPE OF THE NEUTRINO MECHANISM OF CORE-COLLAPSE SUPERNOVAE: NEUTRON STAR AND BLACK HOLE MASS FUNCTIONS, EXPLOSION ENERGIES, AND NICKEL YIELDS (2014, background): “The response of the neutrino mechanism to accretion of significant radial and angular density variations is only beginning to be explored (Couch & Ott 2013).”