Impacts of Collective Neutrino Oscillations on Core-collapse Supernova Explosions
Impacts of Collective Neutrino Oscillations on Core-collapse Supernova Explosions
复制标题
集体中微子振荡对核心塌陷超新星爆炸的影响
DOI：
10.1088/0004-637x/738/2/165
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Katsuhiko
中科院分区：
文献类型：
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作者：
Suwa;Yudai ; Kotake;Kei ; Takiwaki;Tomoya ; Liebendorfer;Matthias ; Sato;Katsuhiko
通过一系列一维和二维（1D和2D）的流体动力学模拟和中微子光谱输运，我们研究了集体中微子振荡对核心坍缩超新星动力学的可能影响.为了模拟光谱交换，这是集体中微子振荡的可能结果之一，我们参数化的开始时间时，光谱交换开始，光谱交换发生的半径，以及阈值能量以上的重轻子中微子和电子/反电子中微子之间的光谱交换发生。通过这样做，我们系统地研究了光谱交换增强的中微子加热如何影响激波演化以及物质喷射。我们还调查了祖依赖使用一套祖模型（13，15，20，和25 M回流）。我们发现，有一个临界加热速率引起的光谱交换，触发爆炸，显着不同的祖细胞。由于多维性提高了中微子的加热效率，2D的临界加热率通常小于1D。对于本文中使用的祖细胞，最终的残余质量估计在1.1-1.5 M之间。对于我们的15 M祖先的2D模型，我们发现了一组振荡参数，可以解释强烈的超新星爆炸（1051 erg），同时留下接近101.4 M的残余质量。
By performing a series of one-and two-dimensional (1D and 2D) hydrodynamic simulations with spectral neutrino transport, we study possible impacts of collective neutrino oscillations on the dynamics of core-collapse supernovae. To model the spectral swapping, which is one of the possible outcome of the collective neutrino oscillations, we parameterize the onset time when the spectral swap begins, the radius where the spectral swap occurs, and the threshold energy above which the spectral interchange between heavy-lepton neutrinos and electron/anti-electron neutrinos takes place. By doing so, we systematically study how the neutrino heating enhanced by the spectral swapping could affect the shock evolution as well as the matter ejection. We also investigate the progenitor dependence using a suite of progenitor models (13, 15, 20, and 25 M☉). We find that there is a critical heating rate induced by the spectral swapping that triggers explosions, and which significantly differs between the progenitors. The critical heating rate is generally smaller for 2D than for 1D due to the multidimensionality that enhances the neutrino heating efficiency. For the progenitors employed in this paper, the final remnant masses are estimated to range between 1.1–1.5 M☉. For our 2D model of the 15 M☉ progenitor, we find a set of oscillation parameters that could account for strong supernova explosions (∼ 10 51 erg), simultaneously leaving behind a remnant mass close to∼ 1.4 M☉.