Pair Plasma Dominance in the Parsec-Scale Relativistic Jet of 3C 345

  title={Pair Plasma Dominance in the Parsec-Scale Relativistic Jet of 3C 345},
  author={Kouichi Hirotani and Satoru Iguchi and Moritaka Kimura and Kiyoaki Wajima},
  journal={The Astrophysical Journal},
  pages={100 - 106}
We investigate whether a parsec-scale jet of 3C 345 is dominated by a normal plasma or an electron-positron plasma. We present a general condition that a jet component becomes optically thick for synchrotron self-absorption by extending the method originally developed by Reynolds and coworkers. The general condition gives a lower limit of the electron number density, with the aid of the surface brightness condition, which enables us to compute the magnetic field density. Comparing the lower… 

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The Parsec-Scale Jet in Quasar 3C 345