论文标题
高红移大麻的多波长研究
Multiwavelength Study of High-Redshift Blazars
论文作者
论文摘要
高红移大酒将是宇宙中最强大的对象之一。通过分析{\ it fermi} -lat和{\ it swift} uvot/ xrt数据，研究了在高能$γ$ -Ray频段中检测到的三十三个遥远的近距离（$ z> 2.5 $）的光谱和时间特性。所考虑的来源平均$γ$ -Ray光谱（$γ_ {\rmγ} \ geq2.2 $），而在X射线频段中观察到的那些具有硬X射线光谱（$γ_{\ rm x} = 1.01-1-1.86 $）。高还原速度Blazars的$γ$ -Ray通量范围从$ 4.84 \ times10^{ - 10} $到$ 1.50 \ times10^{ - 7} \：{\ rm photon \：cm^：cm^{ - 2} { - 2} \： $（0.10-5.54）\ times10^{48} \：{\ rm erg \ \：s^{ - 1}} $，在$γ$ -Ray-ray flares期间增加到$（0.1-1）\ times10^{50^{50} {50} \：在X射线频带中，只有PKS 0438-43，B2 0743+25和TXS 0222+185在不同的迅速XRT观察中有所不同0347-211和PKS 0451-28在一天尺度上，而其他人的$γ$ ray可变性为一周或一个月。 The properties of distant blazar jets are derived by modeling the multiwavelength spectral energy distributions within a one-zone leptonic scenario assuming that the X-ray and $γ$-ray emissions are produced from inverse Compton scattering of synchrotron and dusty torus photons.从拟合中，发现排放区域的大小为$ \ leq0.05 $ PC，磁场和多普勒因子相应地在$ 0.10-1.74 $ g和$ 10.0-27.4 $之内。通过对Optical-UV过量进行建模，我们发现中央黑孔质量和积聚磁盘发光度在$ l _ {\ rm d}} \ simeq（1.09-10.94）\ times10^{46} {46} \： $（1.69-5.35）\ times10^{9} \：m_ \ odot $。
High-redshift blazars are among the most powerful objects in the Universe. The spectral and temporal properties of thirty-three distant blazars ($z>2.5$) detected in the high energy $γ$-ray band are investigated by analyzing the {\it Fermi}-LAT and {\it Swift} UVOT/ XRT data. The considered sources have soft time averaged $γ$-ray spectra ($Γ_{\rm γ}\geq2.2$) whereas those that have been observed in the X-ray band have hard X-ray spectra ($Γ_{\rm X}=1.01-1.86$). The $γ$-ray flux of high-redshift blazars ranges from $4.84\times10^{-10}$ to $1.50\times10^{-7}\:{\rm photon\:cm^{-2}\:s^{-1}}$ and the luminosity is within $(0.10-5.54)\times10^{48}\:{\rm erg\:s^{-1}}$ which during the $γ$-ray flares increases up to $(0.1-1)\times10^{50}\:{\rm erg\:s^{-1}}$. In the X-ray band, only the emission of PKS 0438-43, B2 0743+25 and TXS 0222+185 is found to vary in different Swift XRT observations whereas in the $γ$-ray band, the emission is variable for fourteen sources: the flux of B3 1343+451 and PKS 0537-286 changes in sub-day scales, that of PKS 0347-211 and PKS 0451-28 in day scales, while the$γ$-ray variability of the others is in week or month scales. The properties of distant blazar jets are derived by modeling the multiwavelength spectral energy distributions within a one-zone leptonic scenario assuming that the X-ray and $γ$-ray emissions are produced from inverse Compton scattering of synchrotron and dusty torus photons. From the fitting, the emission region size is found to be $\leq0.05$ pc and the magnetic field and the Doppler factor are correspondingly within $0.10-1.74$ G and $10.0-27.4$. By modeling the optical-UV excess, we found that the central black hole masses and accretion disk luminosities are within $L_{\rm d}\simeq(1.09-10.94)\times10^{46}\:{\rm erg \: s^{-1}}$ and $(1.69-5.35)\times10^{9}\:M_\odot$, respectively.
