论文标题
使用多色黑体的短伽马射线爆发的迅速排放的研究：视角的线索
Study of prompt emission of short gamma ray bursts using multi-color blackbody: a clue to the viewing angle
论文作者
论文摘要
使用多色黑体模型分析了带有已知红移的短伽马射线爆发（SGRB）的迅速排放，这些模型考虑到了无遗嘱性光球的发射，考虑到了动力法射流结构和射流的观看几何形状。我们发现样本的近69美元和26美元的样本分别与多色黑体和纯黑体模型一致。使用这种解释，我们推断出，在我们的样品中（或沿着）射流芯的边缘（或沿着）中观察到了近57美元的SGRB $ 57 \％\，（18 \％）$。 SGRB喷气机被推论为具有中间$θ_C\ sim 3^{\ circ} $的狭窄核心。这表明在Jet Core中可以查看的SGRB速率为$ 1.8-26 \，\ rm gpc^{ - 3} \，yr^{ - 1} $。喷射结构降低的Lorentz因子概况的功率法指数将$ 1.3-2.2 $。固有的光度在$ 10^{48} -10^{53} \，\ rm erg/s $之间的范围之间。 SGRB喷气机的Lorentz因子和喷嘴半径的平均值推断为$ 210 \，（85）$和$ 10^{7.7} \，（10^{9.6}）\，\ rm cm $，对于沿海（加速）阶段形成光电的情况时，案例的情况下。在这种物理解释中，GRB流出和查看几何不同参数的推断值的可行性增强了光电发射模型的前景，以解释观察到的GRB光谱。
The prompt emission of short gamma ray bursts (sGRBs) with known redshifts are analyzed using the model of multi-color blackbody which is interpreted as the emission from a non-dissipative photosphere taking into account a power law jet structure and the viewing geometry of the jet. We find nearly $69\%$ and $26\%$ of the sample are consistent with multi-color blackbody and a pure blackbody model, respectively. Using this interpretation, we infer that nearly $57\% \, (18\%)$ of the sGRBs in our sample are observed within (or along the edge of) the jet core. The sGRB jets are deduced to possess a narrow core with a median $θ_c \sim 3^{\circ}$. This suggests the rate of sGRBs that would be viewed within the jet core to be $1.8 - 26 \, \rm Gpc^{-3} \, yr^{-1}$. The power law index of the decreasing Lorentz factor profile of the jet structure is deduced to be $1.3 - 2.2$. The intrinsic luminosity is found to range between $10^{48} - 10^{53}\, \rm erg/s$. The average values of Lorentz factor and nozzle radius of the sGRB jets are inferred to be $210\, (85)$ and $10^{7.7} \, (10^{9.6}) \, \rm cm$ for the cases when the photosphere forms in the coasting (accelerating) phase respectively. The viability of the inferred values of the different parameters of the GRB outflow and viewing geometry within this physical interpretation enhances the prospect of the photospheric emission model to explain the observed GRB spectrum.
