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arXiv 0906.5440astro-ph.HEastro-ph.CO
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GRB余辉旋光法的过去、现在和未来

GRB Afterglow Polarimetry: Past, Present and Future

Stefano Covino

摘要:

伽马射线暴及其余辉被认为是由超相对论性喷流产生的。最重要的未决问题之一是流出成分:能量可以从中心源以(重子和/或重子对的)动能或电磁形式(坡印廷通量)携带。虽然在这两种情况下,总的可观测通量可能无法区分,但其偏振特性预计会明显不同。余辉偏振的后期演化也是喷流几何形状的一个强有力的诊断。同样,由于输出通量存在细微且几乎不可检测的差异,我们有不同的偏振预测。

英文摘要:

Gamma-ray bursts and their afterglows are thought to be produced by an ultrarelativistic jet. One of the most important open questions is the outflow composition: the energy may be carried out from the central source either as kinetic energy (of baryons and/or pairs), or in electromagnetic form (Poynting flux). While the total observable flux may be indistinguishable in both cases, its polarization properties are expected to differ markedly. The later time evolution of afterglow polarization is also a powerful diagnostic of the jet geometry. Again, with subtle and hardly detectable differences in the output flux, we have distinct polarization predictions.

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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