A Non-Mainstream Viewpoint on Apparent Superluminal Phenomena in AGN Jet

Journal of astrophysics and astronomy

Chun-Cheng Wang²  Li-Yan Liu¹  Wen-Po Liu1¹ 

[1] College of Science, Civil Aviation University of China, Tianjin 300300, China.$$;Key Laboratory for Research in Galaxies and Cosmology, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, China.$$

关键词: Galaxies: active;    galaxies: jets.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

The group velocity of light in material around the AGN jet is acquiescently one (𝑐 as a unit), but this is only a hypothesis. Here, we re-derive apparent superluminal and Doppler formulas for the general case (it is assumed that the group velocity of light in the uniform and isotropic medium around a jet (a beaming model) is not necessarily equal to one, e.g., Araudo et al. (2010) thought that there may be dense clouds around AGN jet base), and show that the group velocity of light close to one could seriously affect apparent superluminal phenomena and Doppler effect in the AGN jet (when the viewing angle and Lorentz factor take some appropriate values).

【 授权许可】

Unknown