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Impacts of Rotation on Three-dimensional Hydrodynamics of Core-collapse Supernovae by Nakamura, Ko; Kuroda, Takami; Takiwaki, Tomoya; Kotake, Kei is a scholarly article available to read on EtoBox.

What is Impacts of Rotation on Three-dimensional Hydrodynamics of Core-collapse Supernovae about?

We perform a series of simplified numerical experiments to explore how rotation impacts on the three-dimensional (3D) hydrodynamics of core-collapse supernovae. For the sake of our systematic study, we employ a light-bulb scheme to trigger explosions and a three-flavor neutrino leakage scheme to treat deleptonization effects and neutrino losses from proto-neutron star interior. Using a 15 solar mass progenitor, we compute thirty models in 3D with a wide variety of initial angular momentum and light-bulb neutrino luminosity. We find that the rotation can help onset of neutrino-driven explosions for the models in which the initial angular momentum is matched to that obtained in recent stellar evolutionary calculations (0.3-3 rad/s at the center). For the models with larger initial angular momentum, the shock surface deforms to be more oblate due to larger centrifugal force. This makes not only a gain region more concentrated around the equatorial plane, but also the mass in the gain region bigger. As a result, buoyant bubbles tend to be coherently formed and rise in the equatorial region, which pushes the revived shock ever larger radii until a global explosion is triggered. We find

Author

Nakamura, Ko; Kuroda, Takami; Takiwaki, Tomoya; Kotake, Kei

Published

2014

Language

EN