HIGH-RESOLUTION THREE-DIMENSIONAL SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE IN MULTIPLE PROGENITORS
HIGH-RESOLUTION THREE-DIMENSIONAL SIMULATIONS OF CORE-COLLAPSE SUPERNOVAE IN MULTIPLE PROGENITORS
复制标题
多个祖细胞中核心塌陷超新星的高分辨率三维模拟
DOI：
10.1088/0004-637x/785/2/123
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
E. O’Connor
中科院分区：
文献类型：
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作者：
S. Couch;E. O’Connor
核心坍缩超新星（CCSNe）的三维（3D）模拟为驱动成功爆炸的尚未确定的机制提供了新的见解。虽然关于3D是否比2D更容易获得爆炸仍然存在争议，但不可否认的是，3D和2D模拟结果之间存在定性和定量差异。我们提出了一套广泛的高分辨率1D，2D和3D CCSN模拟与多物种中微子泄漏在两个不同的祖细胞进行。我们的模拟证实了Couch的结果，表明2D比3D更容易爆炸。我们认为，这是由于2D的不足，以准确地捕捉3D动态的重要方面。我们发现，如果不人为地提高中微子加热速率，我们不会获得爆炸的3D。我们研究中微子驱动的对流和站立的吸积激波不稳定性（SASI）的发展，并发现，在不同的制度，无论是不稳定性可以占主导地位。我们发现的SASI增长的证据为15 M的潮汐和27 M的祖细胞，但是，它是较弱的三维爆炸模型。与我们的无轴三维笛卡尔模拟相比，这两种不稳定性的增长率沿二维对称轴被人为地沿着增强。我们的工作强调了越来越多的共识，即如果我们希望解决爆炸如何提供动力的谜团，就必须在3D中研究CCSNe。
Three-dimensional (3D) simulations of core-collapse supernovae (CCSNe) are granting new insight into the as-yet-uncertain mechanism that drives successful explosions. While there is still debate about whether explosions are obtained more easily in 3D than in 2D, it is undeniable that there exist qualitative and quantitative differences between the results of 3D and 2D simulations. We present an extensive set of high-resolution 1D, 2D, and 3D CCSN simulations with multispecies neutrino leakage carried out in two different progenitors. Our simulations confirm the results of Couch indicating that 2D explodes more readily than 3D. We argue that this is due to the inadequacies of 2D to accurately capture important aspects of the 3D dynamics. We find that without artificially enhancing the neutrino heating rate, we do not obtain explosions in 3D. We examine the development of neutrino-driven convection and the standing accretion shock instability (SASI) and find that, in separate regimes, either instability can dominate. We find evidence for growth of the SASI for both 15 M☉ and 27 M☉ progenitors; however, it is weaker in 3D exploding models. The growth rate of both instabilities is artificially enhanced along the symmetry axis in 2D as compared with our axis-free 3D Cartesian simulations. Our work highlights the growing consensus that CCSNe must be studied in 3D if we hope to solve the mystery of how the explosions are powered.
DOI：
10.1088/0004-637x/694/1/664
发表时间：
2007-08
期刊：
The Astrophysical Journal
影响因子：
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作者：
A. Marek;H. Janka
通讯作者：
A. Marek;H. Janka