Anisotropic Neutrino Radiation in Rotational Core Collapse
Anisotropic Neutrino Radiation in Rotational Core Collapse
复制标题
旋转核心塌陷中的各向异性中微子辐射
DOI：
10.1086/377196
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Katsuhiko Sato
中科院分区：
文献类型：
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作者：
K. Kotake;S. Yamada;Katsuhiko Sato
我们对超新星核的旋转坍缩进行了一系列的二维流体力学模拟，并估算了非球形中微子球的中微子辐射的各向异性。我们采用了一个真实的状态方程，并用所谓的泄漏方案近似计算了电子俘获和中微子输运。我们已经计算了中微子球外的加热率，假设中微子从中微子球上的每个点各向同性地发射。我们发现，中微子在自转轴附近的热物质比在赤道平面附近的热物质更强烈。这可能会引发全球各向异性爆炸。
We have done a series of two-dimensional hydrodynamic simulations of the rotational collapse of a supernova core and estimated the anisotropy of neutrino radiation from nonspherical neutrino spheres. We have employed a realistic equation of state and approximated electron captures and neutrino transport by the so-called leakage scheme. We have calculated heating rates outside the neutrino sphere, assuming that neutrinos are emitted isotropically from each point on the neutrino sphere. We have found that neutrinos heat matter near the rotational axis more strongly than those near the equatorial plane. This might induce a globally anisotropic explosion.