The Inhomogeneous Jet Parameters in Active Galactic Nuclei
The Inhomogeneous Jet Parameters in Active Galactic Nuclei
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DOI：
10.1086/305182
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发表时间：
1997-11
期刊：
影响因子：
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通讯作者：
Dong-Rong Jiang;Xinwu Cao;Xiaoyu Hong
中科院分区：
文献类型：
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作者：
Dong-Rong Jiang;Xinwu Cao;Xiaoyu Hong
应用Königl非均匀喷流模型研究了活动星系核（AGN）中喷流的性质。一个样本的活动星系核，其中包括测量的角度大小和射电通量密度的VLBI核心，自行车的组件在射流，和X射线通量密度收集。非均匀射流参数的推导与所有来源相同的假设。文中还对样品中不同类型源的参数进行了比较。结果表明，与样品中的其它源相比，EGRET源具有较高的多普勒因子δ、较大的洛仑兹因子γ和较小的视角θ。统计分析表明，导出的多普勒因子δ与观测到的22 GHz亮温有很强的相关性。此外，γ射线相对光度与多普勒因子δ之间存在相关性。这些结果的影响进行了讨论。
The Königl inhomogeneous jet model is applied to investigate the properties of the jets in active galactic nuclei (AGNs). A sample of AGNs that includes measurements of the angular size and radio flux density of the VLBI core, proper motion of the components in the jet, and X-ray flux density is collected. The inhomogeneous jet parameters are derived with the same assumptions for all sources. A comparison among the parameters of different types of sources in the sample is presented. It is found that most of EGRET sources have higher Doppler factors δ, larger Lorentz factors γ, and smaller viewing angles θ as compared to the other sources in the sample. The statistical analyses show that the derived Doppler factor δ is strongly correlated with the observed 22 GHz brightness temperature. Furthermore, there is a correlation between the relative γ-ray luminosity and the Doppler factor δ. The implications of these results are discussed.