The Progenitor Dependence of Core-collapse Supernovae from Three-dimensional Simulations with Progenitor Models of 12–40 M⊙
The Progenitor Dependence of Core-collapse Supernovae from Three-dimensional Simulations with Progenitor Models of 12–40 M⊙
复制标题
12-40 M祖细胞模型三维模拟中核心塌缩超新星的祖细胞依赖性⊙
DOI：
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
E. Schnetter
中科院分区：
文献类型：
--
作者：
C. Ott;L. Roberts;André da Silva Schneider;J. M. Fedrow;R. Haas;E. Schnetter
我们首次研究了核坍缩超新星的三维中微子机制与前驱恒星的关系。我们采用全三维广义相对论多群中微子辐射流体力学，模拟了零龄主序质量分别为12、15、20、27和40M⊙的前子粒子的反弹后演化。所有的前身，除了12米高的⊙恒星，在他们的模拟结束时都经历了震荡失控。在大多数情况下，会导致强烈的不对称爆炸。我们发现了三个定性上不同的演化，表明爆炸动力学对前驱粒子密度结构、中微子加热和3D流动具有复杂的依赖性。(1)核质量大、密度剖面浅、核反弹后吸积率高的前驱粒子经历了很强的中微子加热和中微子驱动的湍流对流，导致了早期的激波失控。吸积继续以高速度进行，很可能导致黑洞的形成。(2)中间前身经历由中微子驱动、湍流辅助的爆炸，这些爆炸是由密度不连续到达激波所触发的。这些通常发生在硅/硅-氧壳层边界。(3)核心数和密度分布较小且无强不连续性的母体经历激波退缩，发展三维驻留吸积激波不稳定(SASI)。激波失控在后期接踵而至，一旦吸积率下降，SASI和中微子驱动的对流创造了有利的条件。这些爆炸时间和动力学上的差异导致了前驱物质和致密残余质量之间的非单调关系。
We present a first study of the progenitor star dependence of the three-dimensional (3D) neutrino mechanism of core-collapse supernovae. We employ full 3D general-relativistic multi-group neutrino radiation-hydrodynamics and simulate the postbounce evolutions of progenitors with zero-age main sequence masses of 12, 15, 20, 27, and 40 M⊙. All progenitors, with the exception of the 12 M⊙ star, experience shock runaway by the end of their simulations. In most cases, a strongly asymmetric explosion will result. We find three qualitatively distinct evolutions that suggest a complex dependence of explosion dynamics on progenitor density structure, neutrino heating, and 3D flow. (1) Progenitors with massive cores, shallow density profiles, and high post-core-bounce accretion rates experience very strong neutrino heating and neutrino-driven turbulent convection, leading to early shock runaway. Accretion continues at a high rate, likely leading to black hole formation. (2) Intermediate progenitors experience neutrino-driven, turbulence-aided explosions triggered by the arrival of density discontinuities at the shock. These occur typically at the silicon/silicon–oxygen shell boundary. (3) Progenitors with small cores and density profiles without strong discontinuities experience shock recession and develop the 3D standing-accretion shock instability (SASI). Shock runaway ensues late, once declining accretion rate, SASI, and neutrino-driven convection create favorable conditions. These differences in explosion times and dynamics result in a non-monotonic relationship between progenitor and compact remnant mass.
电子捕获和低质量铁核塌陷超新星：新的中微子辐射流体动力学模拟
DOI：
10.3847/1538-4357/aa92c5
发表时间：
2017
期刊：
The Astrophysical Journal
影响因子：
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作者：
Radice, David;Burrows, Adam;Vartanyan, David;Skinner, M. Aaron;Dolence, Joshua C.
通讯作者：
Dolence, Joshua C.
DOI：
10.1146/annurev-nucl-102115-044747
发表时间：
2016-02
影响因子：
12.4
作者：
H. Janka;T. Melson;A. S. M. Astrophysics;Garching;Physik Dept.;Tum
通讯作者：
H. Janka;T. Melson;A. S. M. Astrophysics;Garching;Physik Dept.;Tum