A New Gravitational-Wave Signature from Standing Accretion Shock Instabilities in Supernovae
作者： Tomoya Takiwaki , Takami Kuroda , Kei Kotake
DOI: 10.3847/2041-8205/829/1/L14
关键词:
摘要: We present results from fully relativistic three-dimensional core-collapse supernova (CCSN) simulations of a non-rotating 15 Msun star using three different nuclear equations state (EoSs). From our covering up to ~350 ms after bounce, we show that the development standing accretion shock instability (SASI) differs significantly depending on stiffness EoS. Generally, SASI activity occurs more vigorously in models with softer By evaluating gravitational-wave (GW) emission, find new GW signature top previously identified one, which typical frequency increases time due an accumulating proto-neutron (PNS). The newly observed quasi-periodic signal appears range ~100 200 Hz and persists for ~150 before neutrino-driven convection dominates over SASI. analyzing cycle sloshing spiral modes as well mass rate emission region, is correlated frequency. This because SASI-induced temporary perturbed strike PNS surface, leading emission. Our signal, could be smoking-gun SASI, within detection limits LIGO, advanced Virgo, KAGRA Galactic events.
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