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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Energy conversion efficiency in prompt emissions of gamma-ray bursts
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Energy conversion efficiency in prompt emissions of gamma-ray bursts

机译：迅速发射伽马射线爆发时的能量转换效率

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摘要

Using 52 gamma-ray bursts observed and localized by BeppoSAX and HETE-2, a comprehensive analysis of the correlation between the properties of prompt emissions and the brightness of the afterglows was performed. We found a highly significant correlation between the isotropic total energy of prompt emission and luminosity of optical afterglow. There is also a correlation between the fluence in prompt emission and the magnitude of the optical afterglow. We then investigated the energy conversion efficiency in prompt emissions of gamma-ray bursts using 24 bursts with the known redshift. We calculated the kinetic energy of relativistic shells from the luminosities of the optical afterglows. The energy-conversion efficiency, as estimated by comparing this kinetic energy with the total radiated energy of prompt emission, is distributed between about 1% and 40%. This result suggests that the ratio of the Lorentz factor of two colliding shells is large, or the fraction of shock energy that goes into the electrons is small for the internal shock scenario.
机译：使用由BeppoSAX和HETE-2观测并定位的52个伽马射线爆发，对瞬发发射特性与余辉亮度之间的相关性进行了全面分析。我们发现瞬态发射的各向同性总能量与光学余辉的发光度之间存在高度显着的相关性。即时发射的注量与光学余辉的大小之间也存在相关性。然后，我们使用已知的红移，使用24个脉冲，研究了伽马射线脉冲快速发射中的能量转换效率。我们从光学余辉的光度计算了相对论壳的动能。通过将该动能与即时发射的总辐射能进行比较可以估算出能量转换效率大约在1％到40％之间。该结果表明，在内部撞击情况下，两个碰撞壳的洛伦兹因子之比很大，或者进入电子的撞击能量所占的比例很小。

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