A puzzle of the radio-quiet quasar PG 1407+265:Are optical and X-ray emissions produced from a relativistic jet?  

作　　者：CHEN Liang 1,2,3 & BAI JinMing 1,2 1 National Astronomical Observatories/Yunnan Observatory,Chinese Academy of Sciences,Kunming 650011,China 2 Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650011,China 3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第1期183-186,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：the West Ph.D. project of the Training Program for Talents of the West Light Foundation of the CAS;the National Natural Science Foundation of China (Grant Nos. 10903025,10778702,10973034 and 11078008) for financial support;the support of the State Key Development Program for Basic Research of China (Grant No.2009CB824800)

摘　　要：PG 1407+265 is a radio quiet quasar that has a relativistic jet.In this report,we show some peculiar properties of its optical and X-ray emissions,which indicate possible non-thermal origins produced from the jet.We use a simple synchrotron + synchrotron self Compton (SSC) model to fit the emissions with different ratios of energy densities between the magnetic field and electrons (η≡U B/U e),which predicts a different γ-ray luminosity.The First LAT AGN Catalog (1LAC) did not include PG 1407+265,which indicates an upper limit of γ-ray luminosity.This upper limit constrains the ratio to be unreasonably large (η≥10 4-5).This inversely indicates that the optical and X-ray emissions may not be produced from the beaming jet.We discuss the physical implications of these results.PG 1407＋265 is a radio quiet quasar that has a relativistic jet.In this report,we show some peculiar properties of its optical and X-ray emissions,which indicate possible non-thermal origins produced from the jet.We use a simple synchrotron ＋ synchrotron self Compton （SSC） model to fit the emissions with different ratios of energy densities between the magnetic field and electrons （η≡U B/U e）,which predicts a different γ-ray luminosity.The First LAT AGN Catalog （1LAC） did not include PG 1407＋265,which indicates an upper limit of γ-ray luminosity.This upper limit constrains the ratio to be unreasonably large （η≥10^4-5）.This inversely indicates that the optical and X-ray emissions may not be produced from the beaming jet.We discuss the physical implications of these results.

关 键 词：active galactic nuclei JET non-thermal emission PG 1407＋265 

分 类 号：P158[天文地球—天文学]