Characterizing the Gravitational Wave Signal from Core-collapse Supernovae
Characterizing the Gravitational Wave Signal from Core-collapse Supernovae
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DOI：
10.3847/2041-8213/ab191a
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
D. Radice;V. Morozova;A. Burrows;D. Vartanyan;H. Nagakura
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文献类型：
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作者：
D. Radice;V. Morozova;A. Burrows;D. Vartanyan;H. Nagakura
我们研究了八个新的3D核心坍缩超新星模拟的引力波（GW）信号。我们发现，信号主要是由f-和g-模式振荡的质子中子星星（PNS）和其频率演变编码的收缩率，后者，这反过来，是已知的依赖于星星的质量，状态方程，并在温暖的核物质的运输性能。一个较低的频率分量的信号，与常设吸积激波不稳定性，被发现在我们的模型中只有一个。最后，我们表明，在GWs辐射的能量是成比例的PNS吸积的湍流能量的量。
We study the gravitational wave (GW) signal from eight new 3D core-collapse supernova simulations. We show that the signal is dominated by f- and g-mode oscillations of the protoneutron star (PNS) and its frequency evolution encodes the contraction rate of the latter, which, in turn, is known to depend on the star’s mass, on the equation of state, and on transport properties in warm nuclear matter. A lower-frequency component of the signal, associated with the standing accretion shock instability, is found in only one of our models. Finally, we show that the energy radiated in GWs is proportional to the amount of turbulent energy accreted by the PNS.