Impacts of rotation on three-dimensional hydrodynamics of core-collapse supernovae

Ko Nakamura, Takami Kuroda, Tomoya Takiwaki, Kei Kotake

    Research output: Contribution to journalArticle

    26 Citations (Scopus)

    Abstract

    We perform a series of simplified numerical experiments to explore how rotation impacts the three-dimensional (3D) hydrodynamics of core-collapse supernovae. For 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 the proto-neutron-star interior. Using a 15 M Oprogenitor, we compute 30 models in 3D with a wide variety of initial angular momentum and light-bulb neutrino luminosity. We find that the rotation can help the 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-1at the center). For the models with larger initial angular momentum, the shock surface deforms to be more oblate due to larger centrifugal force. This not only makes the gain region more concentrated around the equatorial plane, but also makes the mass larger in the gain region. As a result, buoyant bubbles tend to be coherently formed and rise in the equatorial region, which pushes the revived shock toward ever larger radii until a global explosion is triggered. We find that these are the main reasons that the preferred direction of the explosion in 3D rotating models is often perpendicular to the spin axis, which is in sharp contrast to the polar explosions around the axis that were obtained in previous two-dimensional simulations.

    Original languageEnglish
    Article number45
    JournalAstrophysical Journal
    Volume793
    Issue number1
    DOIs
    Publication statusPublished - 2014 Sep 20

    Fingerprint

    supernovae
    explosions
    explosion
    hydrodynamics
    neutrinos
    angular momentum
    luminaires
    shock
    equatorial regions
    centrifugal force
    neutron stars
    leakage
    bubble
    bubbles
    actuators
    luminosity
    radii
    simulation
    experiment

    Keywords

    • hydrodynamics
    • neutrinos
    • supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Impacts of rotation on three-dimensional hydrodynamics of core-collapse supernovae. / Nakamura, Ko; Kuroda, Takami; Takiwaki, Tomoya; Kotake, Kei.

    In: Astrophysical Journal, Vol. 793, No. 1, 45, 20.09.2014.

    Research output: Contribution to journalArticle

    Nakamura, Ko ; Kuroda, Takami ; Takiwaki, Tomoya ; Kotake, Kei. / Impacts of rotation on three-dimensional hydrodynamics of core-collapse supernovae. In: Astrophysical Journal. 2014 ; Vol. 793, No. 1.
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