中国物理B ›› 2001, Vol. 10 ›› Issue (3): 240-245.doi: 10.1088/1009-1963/10/3/313

• • 上一篇    

THE DIFFERENCE OF OPTICAL POLARIZATION PROPERTIES BETWEEN XBLs AND RBLs

谢光中, 梅冬成, 戴本忠   

  1. Yunnan Astronomical Observatory, Chinese Academy of Science, Kunming 650011, China; The National Astronomical Observatories Chinese Academy of Sciences, Beijing 100080, China; Yunnan Astrophysics Center, Yunnan University, Kunming 650091, China
  • 收稿日期:2000-05-30 修回日期:2000-10-23 出版日期:2001-03-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.19863001), and the Applied Basic Research Foundation of Yunnan Province.

THE DIFFERENCE OF OPTICAL POLARIZATION PROPERTIES BETWEEN XBLs AND RBLs

Xie Guang-zhong (谢光中)abc, Mei Dong-cheng (梅冬成)abc, Dai Ben-zhong (戴本忠)abc   

  1. a Yunnan Astronomical Observatory, Chinese Academy of Science, Kunming 650011, China; b The National Astronomical Observatories Chinese Academy of Sciences, Beijing 100080, China; c Yunnan Astrophysics Center, Yunnan University, Kunming 650091, China
  • Received:2000-05-30 Revised:2000-10-23 Online:2001-03-15 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.19863001), and the Applied Basic Research Foundation of Yunnan Province.

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摘要： On the basis of the beaming model, we have derived a relation between the observed polarization (Pob) and Doppler-corrected optical magnitude (mcorr), log Pob=0.4(1-k) mcorr+C. We tested the correlation between Pob} and mcorr. The main results are as follows: (1) for both high and low states, there are strong correlations between Pob and mcorr for 29 RBLs with well-observed polarization and Doppler factor, where mcorr=mob+(3+α)logδ/0.4, and δ is the optical Doppler factor; (2) no correlation exists between Pob and the observed optical magnitude, mob, for the 29 RBLs in high state, but there is a close correlation for the 29 RBLs in low state; (3) however, there is an obvious anti-correlation between Pob and mcorr for 35 XBLs with good simultaneous observation data. Our results show that (i) a new difference in polarization is found between RBLs and XBLs; (ii) this difference in polarization between RBLs and XBLs seems really to be physical differences.

Abstract: On the basis of the beaming model, we have derived a relation between the observed polarization (Pob) and Doppler-corrected optical magnitude (mcorr), log Pob=0.4(1-k) mcorr+C. We tested the correlation between Pob and mcorr. The main results are as follows: (1) for both high and low states, there are strong correlations between Pob and mcorr for 29 RBLs with well-observed polarization and Doppler factor, where mcorr=mob+(3+$\alpha$)log$\delta$/0.4, and $\delta$ is the optical Doppler factor; (2) no correlation exists between Pob and the observed optical magnitude, mob, for the 29 RBLs in high state, but there is a close correlation for the 29 RBLs in low state; (3) however, there is an obvious anti-correlation between Pob and mcorr for 35 XBLs with good simultaneous observation data. Our results show that (i) a new difference in polarization is found between RBLs and XBLs; (ii) this difference in polarization between RBLs and XBLs seems really to be physical differences.

Key words: BL Lac objects, polarization, beaming effect

中图分类号:  (Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))

  • 98.54.Cm
95.30.Gv (Radiation mechanisms; polarization)