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arXiv 0705.0716astro-ph
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回落伽马射线暴超新星的光变曲线计算

Light Curve Calculations of Supernovae from Fallback Gamma-Ray Bursts

Chris L. Fryer, Aimee L. Hungerford, Patrick A. Young

摘要:

目前流行的长时间伽马射线暴(GRB)模型,是从大质量恒星坍缩到黑洞的爆炸:直接或通过后备。那些通过回落形成的伽玛暴将产生更少的放射性镍,因此有人认为(没有任何实际计算)这些系统会产生暗淡的超新星。这些后退的黑洞GRB最近被认为是一组新发现的GRB的可能祖先,缺乏任何相关的超新星。在这里,我们提出了有史以来第一次辐射流体动力学计算的光变曲线的超超新星爆炸的延迟回落伽马射线暴。我们发现,辐射热光变曲线是由冲击沉积的能量,而不是放射性元素的衰变。因此,对这种爆发的观测实际上更多地探测了原始风的密度,而不是放射性镍的产生。

英文摘要:

The currently-favored model for long-duration gamma-ray bursts (GRBs) invokes explosions from the collapse of a massive star down to a black hole: either directly or through fallback. Those GRBs forming via fallback will produce much less radioactive nickel, and hence it has been argued (without any real calculation) that these systems produce dim supernovae. These fallback black-hole GRBs have been recently been argued as possible progenitors of a newly discovered set of GRBs lacking any associated supernovae. Here we present the first ever radiation-hydrodynamics calculations of the light-curves produced in the hypernova explosion by a delayed-fallback gamma-ray burst. We find that the bolometric light-curve is dominated by shock-deposited energy, not the decay of radioactive elements. As such, observations of such bursts actually probe the density in the progenitor wind more than it does the production of radioactive nickel.

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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