论文标题
$ z = 5.18 $ blazar SDSS J013127.34-032100.1的X射线限制
X-ray constraints on the spectral energy distribution of the $z=5.18$ blazar SDSS J013127.34-032100.1
论文作者
论文摘要
我们报告了X射线测量结果，这些测量限制了高还原$ Z = 5.18 $ blazar SDSS J013127.34 $ - $ 032100.1的光谱能量分布（SED），并带有新的XMM-Newton和Nustar暴露。 Blazar的X射线光谱非常适合$γ= 1.9 $和$ n _ {\ rm H} = 1.1 \ times10^{21} {21} \ rm \ cm \ cm \ cm \ cm^{ - 2} $，或$γ_l= 0.5 $，$γ_h= 1.8 $的损坏的功率定律$ n _ {\ rm h}的密度= 3.6 \ times 10^{20} \ rm \ cm^{ - 2} $，由附近明亮源的光谱拟合支持。在较高的X射线能量（1-30 keV）下没有发现额外的光谱断裂。我们通过较低能量的无线电测量和费米 - 拉特伽玛射线上限，构建源的宽带SED，并使用同步 - 孔普通的场景对SED进行建模。这种建模将喷气机的大量多普勒因子限制在$ \ ge $ 7和$ \ ge $ 6（90％）的低位和高$ n _ {\ rm h} $ seds。相应的光束意味着$ \ ge $ 130（低$ n _ {\ rm h} $）或$ \ ge $ 100（高$ n _ {\ rm h} $）高旋转超大型黑洞类似于J0131。
We report on X-ray measurements constraining the spectral energy distribution (SED) of the high-redshift $z=5.18$ blazar SDSS J013127.34$-$032100.1 with new XMM-Newton and NuSTAR exposures. The blazar's X-ray spectrum is well fit by a power law with $Γ=1.9$ and $N_{\rm H}=1.1\times10^{21}\rm \ cm^{-2}$, or a broken power law with $Γ_l=0.5$, $Γ_h=1.8$, and a break energy $E_b=0.7$ keV for an expected absorbing column density of $N_{\rm H}=3.6\times 10^{20}\rm \ cm^{-2}$, supported by spectral fitting of a nearby bright source. No additional spectral break is found at higher X-ray energies (1-30 keV). We supplement the X-ray data with lower-energy radio-to-optical measurements and Fermi-LAT gamma-ray upper limits, construct broadband SEDs of the source, and model the SEDs using a synchro-Compton scenario. This modeling constrains the bulk Doppler factor of the jets to $\ge$7 and $\ge$6 (90%) for the low- and high-$N_{\rm H}$ SEDs, respectively. The corresponding beaming implies $\ge$130 (low $N_{\rm H}$) or $\ge$100 (high $N_{\rm H}$) high-spin supermassive black holes similar to J0131 exist at similar redshifts.
