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arXiv 0912.3577astro-ph.HE
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崩塌体的长期演化:外流生产机制

Long-Term Evolution of Collapsar: Mechanism of Outflow Production

Seiji Harikae, Tomoya Takiwaki, Kei Kotake

摘要:

本文给出了在伽马射线暴(GRBs)的Bracksar模型下旋转大质量恒星坍缩的二维流体动力学(HD)模拟和磁流体动力学(MHD)模拟的数值结果。在最近伽玛暴祖先演化计算的推动下,我们把重点放在较低的中心核的角动量比大多数在以前的研究中。通过进行特殊的相对论模拟,包括现实的状态方程和中微子冷却,我们遵循一个长期的演变缓慢旋转的Eksars到10秒,伴随着形成的喷流和吸积盘。我们发现这种外流可以由MHD过程和中微子过程发射。我们研究了这些喷流的性质,它是否能成为伽玛暴或仍然是原始的弱外流。

英文摘要:

We present our numerical results of two-dimensional hydrodynamic (HD) simulations and magnetohydrodynamic (MHD) simulations of the collapse of rotating massive stars in light of the collapsar model of gamma-ray bursts (GRBs). Pushed by recent evolution calculations of GRB progenitors, we focus on lower angular momentum of the central core than the ones taken mostly in previous studies. By performing special relativistic simulations including both realistic equation of state and neutrino cooling, we follow a long-term evolution of the slowly rotating collapsars up to 10 s, accompanied by the formation of jets and accretion disks. We find such outfows can be launched both by MHD process and neutrino process. We investigeate the properties of these jets whether it can become GRBs or remains primary weak outflow.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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