The jet of FSRQ PKS 1229-02 and its misidentification as a γ-ray AGN  

作　　者：Wei Zhao Xiao-Yu Hong Tao An Jun Yang 

机构地区：[1]Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China [2]Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Nanjing 210008,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Shanghai Tech University,Shanghai 201210,China [5]Department of Earth and Space Sciences,Chalmers University of Technology,Onsala Space Observatory,SE-43992 Onsala,Sweder

出　　处：《Research in Astronomy and Astrophysics》2019年第12期269-280,共12页天文和天体物理学研究（英文版）

摘　　要：Flat-spectrum radio quasar PKS 1229-02 with a knotty and asymmetric radio morphology was identified as the optical and radio counterpart of a γ-ray source. In this paper, we study the properties(e.g.morphology, opacity, polarization and kinematics) of the jet in PKS 1229-02 using radio interferometry.With our results, we find that the knotty and asymmetric morphology of this source may probably shaped by the interaction between its anterograde jet and the nonuniform dense ambient medium. By reproducing a Spectral Energy Distribution of PKS 1229-02 with the obtained kinematic parameters, we find that the relativistic beaming effect in PKS 1229-02 is not strong enough to produce the reported γ-ray emission,i.e. PKS 1229-02 may not be a γ-ray AGN. The misidentification may probably be due to the poor spatial resolution of the γ-ray detector of the previous generation.Flat-spectrum radio quasar PKS 1229-02 with a knotty and asymmetric radio morphology was identified as the optical and radio counterpart of a γ-ray source. In this paper, we study the properties(e.g.morphology, opacity, polarization and kinematics) of the jet in PKS 1229-02 using radio interferometry.With our results, we find that the knotty and asymmetric morphology of this source may probably shaped by the interaction between its anterograde jet and the nonuniform dense ambient medium. By reproducing a Spectral Energy Distribution of PKS 1229-02 with the obtained kinematic parameters, we find that the relativistic beaming effect in PKS 1229-02 is not strong enough to produce the reported γ-ray emission,i.e. PKS 1229-02 may not be a γ-ray AGN. The misidentification may probably be due to the poor spatial resolution of the γ-ray detector of the previous generation.

关 键 词：galaxies:individual(PKS 1229-02) galaxies:jets radio continuum:galaxies 

分 类 号：P15[天文地球—天文学]