Beaming Effect in Fermi Blazars

Beaming Effect in Fermi Blazars
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费米耀变体中的光束效应

DOI:
10.3847/1538-4357/ac3a09
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发表时间:
2012-10
期刊:
PASJ
影响因子:
--
通讯作者:
Huang, Yong
Huang, Yong
中科院分区:
其他
文献类型:
--
作者:
Hua, Tong Xu;Liu, Yi;Qin, Yi-Ping;Huang, Yong

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耀变体显示出极端的观测特性,这是由于喷流靠近视线的光束效应。发现观测光度与同步辐射峰值频率呈负相关,而去束光度与频率呈正相关。在这项工作中,我们重新审视这种相关性的大样本的255耀变体从第四费米目录可用的多普勒因子。我们的分析得出以下结论。(1)观测到的射电、X射线、γ射线和同步辐射峰值亮度都与峰值频率呈负相关,但去束亮度与去束峰值频率呈正相关。这种反相关性是由于选择效应或聚束效应造成的。(2)康普顿优势参数与测热光度和多普勒因子都相关,这意味着康普顿优势越强的源越亮。(3)费米耀变体的辐射热光度可用γ射线光度表示。
Blazars show extreme observational properties that are due to the beaming effect with the jet being close to the line of sight. It was found that the observed luminosity is anticorrelated with the synchrotron peak frequency but the debeamed luminosity and the frequency is positively correlated. In this work, we revisit this correlation for a large sample of 255 blazars from the fourth Fermi catalog with available Doppler factors. Our analysis comes to the following conclusions. (1) The observed radio, X-ray, γ-ray, and synchrotron peak luminosity are all anticorrelated with the peak frequency, but the debeamed luminosity is positively correlated with the debeamed peak frequency. The anticorrelation is due to a selection effect or a beaming effect. (2) The Compton dominance parameter is correlated with both the bolometric luminosity and Doppler factor, implying that the more highly Compton-dominated sources are more luminous. (3) The bolometric luminosity can be represented by the γ-ray luminosity for Fermi blazars.
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