Pair Plasma Dominance in Parsec Scale AGN Jets

• 広谷 幸一

  国立天文台

• Iguchi S.

  国立天文台

• Kimura M.

  国立天文台

• Wajima K.

  The Institute of Space and Astronautical Science

抄録

We investigate whether pc-scale jets of 3C 345 and 3C 279 are 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. 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 limit with another independent constraint that is deduced from the kinetic luminosity, we can distinguish the matter content. We apply the procedure to the five components of 3C 345 (C2, C3, C4, C5, and C7) and the three components of 3C 279 (core, C3 and C4) of which angular diameters and radio fluxes at the peak frequencies were obtainable from literature. Evaluating the Doppler factors by their equipartition values, we find that four of the five components of 3C 345 and all the three components of 3C 279 are likely dominated by an electron-positron plasma.

収録刊行物

• 素粒子論研究

  素粒子論研究 99 (2), B92-B93, 1999

  素粒子論グループ 素粒子論研究 編集部

詳細情報

• CRID: 1390001204076972032
• NII論文ID: 110006416932
• DOI: 10.24532/soken.99.2_b92
• ISSN: 24332895
• ISSN: 03711838
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可