Theoretical study on explosive stellar phenomena via multi-messenger observation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26707013
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Fukuoka University
• Principal Investigator: Kotake Kei 福岡大学, 理学部, 准教授 (20435506)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 超新星爆発 / ニュートリノ / 重力波 / スーパーコンピューティング / ニュートリノ輻射輸送 / 多次元流体シミュレーション / 核密度状態方程式 / 中性子星

Outline of Final Research Achievements

By performing the first ever systematic multi-dimensional neutrino-radiation hydrodynamics of core-collapse supernovae, we have shown that core-compactness of the progenitors is the key to diagnose the explodability of massive stars. Assuming axisymmetry of the star, our self-consistent simulations succeeded in following the long-term postbounce dynamics, about 7 s after the onset of explosion. By making a detailed analysis of the multi-messenger observables, we pointed out that Super-Kamiokande plays an essential role, for a Galactic event, in determining the epoch of core-bounce. The time-stamp of core bounce is indispensable for detecting the subsequent gravitational-wave signals that are produced by neutrino-driven convection and the shock instability in the non-linear phase. Regarding optical observation, we have done an observational drill where we have made a detailed plan for multi-wavelength observation not to miss the once-in-a-lifetime supernova event in our Milky way.

Free Research Field

理論天体物理学