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
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
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.
Received: 30 May 2000
Revised: 23 October 2000
Accepted manuscript online:
PACS:
98.54.Cm
(Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei))
Fund: Project supported by the National Natural Science Foundation of China (Grant No.19863001), and the Applied Basic Research Foundation of Yunnan Province.
Cite this article:
Xie Guang-zhong (谢光中), Mei Dong-cheng (梅冬成), Dai Ben-zhong (戴本忠) THE DIFFERENCE OF OPTICAL POLARIZATION PROPERTIES BETWEEN XBLs AND RBLs 2001 Chinese Physics 10 240
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