论文标题
在南半球唤醒两个$γ$ ray高红移平面金星
Awakening of two $γ$-ray high redshift flat-spectrum radio quasars in the southern hemisphere
论文作者
论文摘要
高红移大麻是研究早期宇宙的宝贵工具。到目前为止，仅在3。$γ$ ray blazars中发现了$γ$ - 雷信号，以PMN J2219-2719（$ Z = 3.63 $）和PMN J2321-0827（$ Z = 3.63 $）（$ Z = 3.16 $）进行分析，通过分析10年$ fermi $ -Fermi $ -Fermi $ -5data。 PMN J2219-2719与全局分析的背景没有区别。在5个月的时期期间，TS值为47.8，通量超过10年平均通量的10倍。此外，$γ$ -Ray位置与PMN J2219-2719的无线位置之间的角度距离仅为$ {0.04}^{\ circ} $。此外，长时间的$γ$ ray和红外光曲线非常相似，这支持了$γ$ - 雷来源与PMN J2219-2719之间的关联。 PMN J2321-0827的全球分析表明，在耀斑阶段，新的$γ$ ray源，TS值为61.4，$γ$ -Ray-ray通量大幅增加。协会的概率表明，PMN J2321-0827可能是新$γ$ ray来源的对应物。将来，通过组合$ fermi $ -lat和即将进行的大型Synoptic调查望远镜来增加高红移$γ$ ray来源的数量。
High-redshift blazars are valuable tools to study the early Universe. So far only a handful of $γ$-ray blazars have been found at redshifts above 3. $γ$-ray signals are detected in the direction of PMN J2219-2719 ($z=3.63$) and PMN J2321-0827 ($z=3.16$) by analyzing the 10-year $Fermi$-LAT Pass 8 data. PMN J2219-2719 is not distinguished from the background in the global analysis. During the 5-month epoch, the TS value is 47.8 and the flux is more than 10 times of the 10-year averaged flux. In addition, the angular distance between the $γ$-ray position and the radio position of PMN J2219-2719 is only ${0.04}^{\circ}$. Moreover, the $γ$-ray and infrared light curves of long time scale are very similar, which support the association between the $γ$-ray source and PMN J2219-2719. The global analysis of PMN J2321-0827 suggest a new $γ$-ray source, during the flare phase, the TS value is 61.4 and the $γ$-ray flux increased significantly. The association probability suggests that PMN J2321-0827 may be the counterpart of the new $γ$-ray source. In the future, the number of high-redshift $γ$-ray sources will increase by combining $Fermi$-LAT and the upcoming Large Synoptic Survey Telescope.
