Correlated Signatures of Gravitational-wave and Neutrino Emission in Threedimensional General-relativistic Core-collapse Supernova Simulations

被引：82

作者：

Kuroda, Takami ^{[1
]}

Kotake, Kei ^{[2
,3
]}

Hayama, Kazuhiro ^{[4
]}

Takiwaki, Tomoya ^{[5
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 9, D-64289 Darmstadt, Germany

[2] Fukuoka Univ, Dept Appl Phys, 8-19-1 Jonan, Fukuoka 8140180, Japan

[3] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany

[4] Univ Tokyo, Inst Cosm Ray Res, KAGRA Observ, 238 Higashi Mozumi, Gifu 5061205, Japan

[5] Natl Astron Observ Japan, Div Theoret Astron, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

来源：

ASTROPHYSICAL JOURNAL | 2017年 / 851卷 / 01期

基金：

欧洲研究理事会;

关键词：

gravitational waves; hydrodynamics; neutrinos; supernovae: general; 3-DIMENSIONAL SIMULATIONS; ACOUSTIC CYCLE; MASSIVE STARS; ACCRETION; EVOLUTION; SIGNALS; SHOCK; CONVECTION; EXPLOSION; INSTABILITIES;

D O I：

10.3847/1538-4357/aa988d

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from general-relativistic (GR) three-dimensional (3D) core-collapse simulations with approximate neutrino transport for three nonrotating progenitors (11.2, 15, and 40 Me) using different nuclear equations of state (EOSs). We find that the combination of progenitor's higher compactness at bounce and the use of softer EOS leads to stronger activity of the standing accretion shock instability (SASI). We confirm previous predications that the SASI produces characteristic time modulations both in neutrino and gravitational-wave (GW) signals. By performing a correlation analysis of the SASI-modulated neutrino and GW signals, we find that the correlation becomes highest when we take into account the time-delay effect due to the advection of material from the neutrino sphere to the proto-neutron star core surface. Our results suggest that the correlation of the neutrino and GW signals, if detected, would provide a new signature of the vigorous SASI activity in the supernova core, which can be hardly seen if neutrino-convection dominates over the SASI.

引用

页数：12

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