论文标题

伽马射线爆发的统计研究在多波长余辉排放中具有喷气突破特征

Statistical study of gamma-ray bursts with jet break feature in multi-wavelength afterglow emissions

论文作者

Zhao, Wen, Zhang, Jia-Chang, Zhang, Qing-Xiang, Liang, Jian-Tong, Luan, Xiao-Hang, Zhou, Qi-Qi, Yi, Shuang-Xi, Wang, Fei-Fei, Zhang, Shao-Tong

论文摘要

通常认为可以将从普通衰减阶段(衰减坡度$ \ sim -1 $)过渡到较陡的阶段(衰减坡度$ \ sim -2 $)。然后,从余气光曲线的喷气间断时间计算出射流开头$θ_ {\ rm jet} $。这允许衍生这些GRB的准校正能量$ e _ {\ rm jet} $。我们广泛地搜索了具有从多波长余辉光曲线的Jet Break特征的GRB,并收集了138个GRB。这些GRB的喷气休息时间主要从1000 s到$ 10^6 $ s,以及直接校正的能量$ e _ {\ rm jet} $ peeps $ \ sim10^{50} $ erg的分布。我们还确认了$ e _ {\rmγ,iso} -e _ {\ rm p,i} $,$ e _ {\ rm jet} -e _ {\ rm p,i} $和$ e _ { γ,ISO} -t _ {\ rm j,z} -e _ {\ rm p,i} $关系与更多的多波长数据保持紧密。这个紧密的$ e _ {\rmγ,iso} -t _ {\ rm j,z} -e _ {\ rm p,i} $关系也与论文中所选GRB的不同基团相吻合。此外,$ e _ {\ rm jet} -t _ {\ rm j,z} -e _ {\ rm p,i} $之间的另外两个新的紧密相关性在本文中得到很好的确认。我们建议那些紧密的三参数相关性更为物理,可以广泛应用以限制宇宙学参数。

It is generally supposed that a transition from the normal decay phase (decay slope $\sim -1$) to a steeper phase (decay slope $\sim -2$) could be suggested as a jet break. The jet opening angle $θ_{\rm jet}$ is then calculated from the jet break time of the afterglow light curve. This allows the derivation of the collimation-corrected energy $E_{\rm jet}$ of those GRBs. We extensively searched for the GRBs with jet break features from multi-wavelength afterglow light curves, and 138 GRBs with significant breaks were collected. The jet break times of those GRBs mainly range from 1000 s to $10^6$ s, and the distribution of the collimation-corrected energy $E_{\rm jet}$ peaks at $\sim10^{50}$ erg. We also confirmed the $E_{\rm γ,iso}-E_{\rm p,i}$, $E_{\rm jet}-E_{\rm p,i}$ and $E_{\rm γ,iso}-θ_{\rm jet}$ relations, and found $E_{\rm γ,iso}-T_{\rm j,z}-E_{\rm p,i}$ relation remains tight with more multi-wavelength data. This tight $E_{\rm γ,iso}-T_{\rm j,z}-E_{\rm p,i}$ relation is also conformed by different groups of our selected GRBs in the paper. In addition, another two new and tighter correlations among $E_{\rm jet}-T_{\rm j,z}-E_{\rm p,i}$ are well confirmed for different circumburst mediums in this paper. We suggest that those tight three-parameter correlations are more physical, and could be widely applied to constrain the cosmological parameters.

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