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      https://www.ias.ac.in/article/fulltext/joaa/035/03/0457-0461

    • Keywords

       

      Galaxies: active; galaxies: individual: PMN J0948+0022; galaxies: Seyfert; galaxies: jets; 𝛾-rays; theory.

    • Abstract

       

      Four well-sampled Spectral Energy Distributions (SEDs) of PMN J0948+0022 are fitted with the syn+SSC+EC model to derive the physical parameters of its jets and to investigate the spectral variations of its SEDs. A tentative correlation between the peak luminosity (𝐿c) and peak frequency (𝑣c) of its inverse Compton (IC) bump is found in both the observer and co-moving frames, indicating that the variations of luminosity are accompanied by the spectral shift. A correlation between 𝐿cs and 𝛿 is found, and thus the magnification of external photon field by the bulk motion of the radiation regions is an essential reason for the spectral variation since, IC bump of PMN J0948+0022 is dominated by the EC process.

    • Author Affiliations

       

      X. N. Sun1 2 Jin Zhang3 2 Y. Lu3 E. W. Liang1 3 2 S. N. Zhang3 4

      1. Department of Physics and GXU-NAOC Centre for Astrophysics and Space Sciences, Guangxi University, Nanning 530004, China.
      2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China.
      3. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.
      4. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

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