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Three-Dimensional Simulation of a Rotating Core-Collapse Supernova

Nakamura, K. and Kuroda, T. and Takiwaki, T. and Kotake, K.. (2015) Three-Dimensional Simulation of a Rotating Core-Collapse Supernova. Publication of Korean Astronomical Society, 30 (2). pp. 481-483.

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Official URL: http://edoc.unibas.ch/41661/

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Abstract

Multi-dimensionality in the inner working of core-collapse supernovae has long been considered one of the most important ingredients to understand the explosion mechanism. We perform a series of numerical experiments to explore how rotation impacts the 3-dimensional hydrodynamics of core-collapse supernova. We employ a light-bulb scheme to trigger explosions and a three-species neutrino leakage scheme to treat deleptonization effects and neutrino losses from the neutron star interior. We find that the rotation can help the onset of neutrino-driven explosions for models in which the initial angular momentum is matched to that obtained from recent stellar evolutionary calculations ( at the center). For models with larger initial angular momenta, a shock surface deforms to be oblate due to larger centrifugal force. This makes a gain region, in which matter gains energy from neutrinos, more concentrated around the equatorial plane. As a result, the preferred direction of the explosion in 3-dimensional rotating models is perpendicular to the spin axis, which is in sharp contrast to the polar explosions around the axis that are often obtained from 2-dimensional simulations.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Kuroda, Takami
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:The Korean Astronomical Society
ISSN:2287-6936
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:30 Jun 2016 11:02
Deposited On:19 May 2016 09:46

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