论文标题
探测高$ Z $短期GRB 201221D的祖先及其在迅速排放中可能的大量加速度
Probing the progenitor of high-$z$ short-duration GRB 201221D and its possible bulk acceleration in prompt emission
论文作者
论文摘要
越来越多的观察到的证据表明，长和短期的伽马射线爆发（GRB）分别源自巨大的恒星核心爆发和紧凑型恒星的合并。 GRB 201221D是一个短期grb，持续$ \ sim 0.1 $ s，没有延长排放（EE），高红移$ z = 1.046 $。通过分析使用Swift/BAT和Fermi/GBM观察到的数据，我们发现截止幂律模型可以用软$ e _ {\ rm p} = 113^{+9} _ { - 7} _ { - 7} $ keV和同位素能量$ e__ {gum e_ {γ，iso，iSo}γ，iSO {γ，iSO {γ，iSo {γ，iSO {γ，iSO {γ，iSO} compoff power-law模型可以充分拟合光谱。 = 1.36^{+0.17} _ { - 0.14} \ times 10^{51}〜\ rm erg $。为了揭示GRB 201221D的物理起源，我们采用了多波长标准（例如Amati关系，$ \ varepsilon $ - 参数 - 参数，振幅参数，当地事件速率密度，亮度功能，宿主星系的属性和属性），并发现Grb 2012年的大部分grb 20122221D sarct intergent aint nourgenge arnatiarn comment starect stare stare此外，我们发现在迅速排放阶段，$ \hatα$大于$ 2+\hatβ$，这表明发射区域可能在迅速发射阶段加速，并具有poynting-flux主导的射流。
The growing observed evidence shows that the long- and short-duration gamma-ray bursts (GRBs) originate from massive star core-collapse and the merger of compact stars, respectively. GRB 201221D is a short-duration GRB lasting $\sim 0.1$ s without extended emission (EE) at high redshift $z=1.046$. By analyzing data observed with the Swift/BAT and Fermi/GBM, we find that a cutoff power-law model can adequately fit the spectrum with a soft $E_{\rm p}=113^{+9}_{-7}$ keV, and isotropic energy $E_{γ,iso} =1.36^{+0.17}_{-0.14}\times 10^{51}~\rm erg$. In order to reveal the possible physical origin of GRB 201221D, we adopted multi-wavelength criteria (e.g., Amati relation, $\varepsilon$-parameter, amplitude parameter, local event rate density, luminosity function, and properties of the host galaxy), and find that most of the observations of GRB 201221D favor a compact star merger origin. Moreover, we find that $\hatα$ is larger than $2+\hatβ$ in the prompt emission phase which suggests that the emission region is possibly undergoing acceleration during the prompt emission phase with a Poynting-flux-dominated jet.
