中国物理B ›› 2003, Vol. 12 ›› Issue (3): 332-335.doi: 10.1088/1009-1963/12/3/316

• • 上一篇    

The ratio RT of the jet to the unbeamed luminosities for superluminal radio sources

林瑞光1, 樊军辉2   

  1. (1)Center for Astrophysics, Guangzhou University, Guangzhou 510400, China; (2)National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China; Center for Astrophysics, Guangzhou University, Guangzhou 510400, China
  • 收稿日期:2002-05-08 修回日期:2002-11-24 出版日期:2003-03-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 19973001), by the State Key Development of Basic Research of China (Grant No G19990754), and the National Natural Science Foundation for Outstanding Young Scientists of China

The ratio RT of the jet to the unbeamed luminosities for superluminal radio sources

Fan Jun-Hui (樊军辉)ab, Lin Rui-Guang (林瑞光)b    

  1. a National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China; b Center for Astrophysics, Guangzhou University, Guangzhou 510400, China
  • Received:2002-05-08 Revised:2002-11-24 Online:2003-03-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 19973001), by the State Key Development of Basic Research of China (Grant No G19990754), and the National Natural Science Foundation for Outstanding Young Scientists of China

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摘要： Relativistic beaming model has been successfully used to explain the observational properties in active galactic nuclei. In this model the emissions are composed of two components, i.e. the boosted and the isotropic emissions. But how much is from each part is unknown. It has been assumed that the luminosity in the jet is proportional to the unbeamed in the comoving frame. However, the value of this ratio is not easy to determine. In this paper, we use the beaming model and the radio sources with superluminal motions to estimate the ratio, R_T, for each source. We find R_T= 0.044±0.02, which is consistent with that found by Orr and Browne.

Abstract: Relativistic beaming model has been successfully used to explain the observational properties in active galactic nuclei. In this model the emissions are composed of two components, i.e. the boosted and the isotropic emissions. But how much is from each part is unknown. It has been assumed that the luminosity in the jet is proportional to the unbeamed in the comoving frame. However, the value of this ratio is not easy to determine. In this paper, we use the beaming model and the radio sources with superluminal motions to estimate the ratio, RT, for each source. We find RT= 0.044±0.02, which is consistent with that found by Orr and Browne.

Key words: active galactic nuclei, superluminal motion, relativistic beaming

中图分类号:  (Galactic nuclei (including black holes), circumnuclear matter, and bulges)

  • 98.62.Js
98.54.Gr (Radio galaxies) 98.54.Aj (Quasars) 98.62.Nx (Jets and bursts; galactic winds and fountains)