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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/032/01-02/0327-0330

    • Keywords

       

      Radiation mechanisms: non-thermal; galaxies: active; galaxies: individual: PKS 2155-304.

    • Abstract

       

      We study multi-wavelength variability in BL Lacertae object PKS 2155-304 in the frame of the time dependent one-zone synchrotron self-Compton (SSC) model, where stochastic particle acceleration is taken into account. In this model, a homogeneously and isotropically spherical structure is assumed, the Fokker–Planck type equation which describes the evolution of the particles energy is numerically solved, and the synchrotron and self-Compton components from the spherical blob are calculated. Our results can reproduce observed spectra energy distribution (SED) and give definite predictions for the flux and spectral variability of PKS 2155-304.We find that particle injection rate, magnetic field and Doppler factor in the acceleration zone are important parameters for explaining its flaring behaviour.

    • Author Affiliations

       

      Y. G. Zheng1 2 L. Zhang1 X. Zhang2 H. J. Ma3

      1. Department of Physics, Yunnan University, Kunming 650091, China.
      2. Department of Physics, Yunnan Normal University, Kunming 650092, China.
      3. College of Yunnan Forestry and Vocational Technology, Kunming 650224, China.
    • Dates

       
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