English

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

High Energy Astrophysical Phenomena 2020-09-09 v1

Abstract

It is generally supposed that a transition from the normal decay phase (decay slope 1\sim -1) to a steeper phase (decay slope 2\sim -2) could be suggested as a jet break. The jet opening angle θjet\theta_{\rm jet} is then calculated from the jet break time of the afterglow light curve. This allows the derivation of the collimation-corrected energy EjetE_{\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 10610^6 s, and the distribution of the collimation-corrected energy EjetE_{\rm jet} peaks at 1050\sim10^{50} erg. We also confirmed the Eγ,isoEp,iE_{\rm \gamma,iso}-E_{\rm p,i}, EjetEp,iE_{\rm jet}-E_{\rm p,i} and Eγ,isoθjetE_{\rm \gamma,iso}-\theta_{\rm jet} relations, and found Eγ,isoTj,zEp,iE_{\rm \gamma,iso}-T_{\rm j,z}-E_{\rm p,i} relation remains tight with more multi-wavelength data. This tight Eγ,isoTj,zEp,iE_{\rm \gamma,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 EjetTj,zEp,iE_{\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.

Keywords

Cite

@article{arxiv.2009.03550,
  title  = {Statistical study of gamma-ray bursts with jet break feature in multi-wavelength afterglow emissions},
  author = {Wen Zhao and Jia-Chang Zhang and Qing-Xiang Zhang and Jian-Tong Liang and Xiao-Hang Luan and Qi-Qi Zhou and Shuang-Xi Yi and Fei-Fei Wang and Shao-Tong Zhang},
  journal= {arXiv preprint arXiv:2009.03550},
  year   = {2020}
}

Comments

11 pages, 4 figures and 2 tables; final version published in ApJ