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    • Volume 35 Issue 3 September 2014 pp 457-461 Part VI: Combined Multi-Waveband Observations

      Spectral Variation of NLS1 Galaxy PMN J0948+0022

      X. N. Sun Jin Zhang Y. Lu E. W. Liang S. N. Zhang

      More Details Abstract Fulltext PDF

      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.

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