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arXiv 0806.3104astro-ph
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定常吸积激波不稳定性产生的磁场

Magnetic field generation by the stationary accretion shock instability

E. Endeve, C. Y. Cardall, R. D. Budiardja, A. Mezzacappa

摘要:

通过在一个球对称的流体结构中加入一个弱磁场来模拟反弹后超新星环境中的失速激波,我们探讨了稳态吸积激波不稳定性(SASI)产生磁场的能力。SASI的发展扰动的初始条件,和随后的流产生-{ \em在没有旋转}-动态显着的磁场($\sim 10^{15}$ G)的时间尺度上,是相关的核心坍缩超新星的爆炸机制。我们描述了我们的模型,提出了一些最近的结果,并讨论了它们的潜在相关性超新星模型。

英文摘要:

By adding a weak magnetic field to a spherically symmetric fluid configuration that caricatures a stalled shock in the post-bounce supernova environment, we explore the capacity of the stationary accretion shock instability (SASI) to generate magnetic fields. The SASI develops upon perturbation of the initial condition, and the ensuing flow generates--{\em in the absence of rotation}--dynamically significant magnetic fields ($\sim 10^{15}$ G) on a time scale that is relevant for the explosion mechanism of core-collapse supernovae. We describe our model, present some recent results, and discuss their potential relevance for supernova models.

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