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arXiv 1112.2673astro-ph.HEnucl-th
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伽马射线暴吸积盘中镍-56的核合成

Nucleosynthesis of Nickel-56 from Gamma-Ray Burst Accretion Disks

R. Surman, G. C. McLaughlin, N. Sabbatino

摘要:

我们研究生产镍-56黑洞吸积盘的前景,通过检查一系列的稳态磁盘模型。我们专注于相对缓慢的吸积盘在0.05 - 1太阳质量每秒的范围内,被认为是适当的长时间伽马射线暴的中央引擎。我们发现,显着量的镍-56在很宽的参数空间范围内产生。讨论了熵、流出时间尺度和初始盘位置对生成的镍-56质量分数的影响。我们仔细跟踪的弱相互作用,以确保可靠的电子分数的计算,并讨论中微子的作用。

英文摘要:

We examine the prospects for producing Nickel-56 from black hole accretion disks, by examining a range of steady state disk models. We focus on relatively slowly accreting disks in the range of 0.05 - 1 solar masses per second, as are thought to be appropriate for the central engines of long-duration gamma-ray bursts. We find that significant amounts of Nickel-56 are produced over a wide range of parameter space. We discuss the influence of entropy, outflow timescale and initial disk position on mass fraction of Nickel-56 which is produced. We keep careful track of the weak interactions to ensure reliable calculations of the electron fraction, and discuss the role of the neutrinos.

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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