Infrared Polarization and Beaming Effect for BL Lac Objects

• 来源期刊: 中国物理快报(英文版)
• 学科: 物理学
• 年，卷（期）: 2001,（5）
• 所属期刊栏目: GEOPHYSICS，ASTRONOMY，AND ASTROPHYSICS
• 页码范围: 708-710
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

With the idea of the beaming models, we derive a relation between the observed polarization and Dopplercorrected magnitude; that is, the observed polarization is in anti-correlation with the Doppler-corrected magnitude. Making use of the infrared data observed simultaneously by Impey et al. [Mon. Not. R. Astron. Soc.200 (1982) 19; 209 (1984) 245] and Holmes et al. [ibid. 210 (1984) 961] we found that: (1) there is a significant correlation between the observed maximum polarization and Doppler-corrected magnitude but the polarization is not in anti-correlation with the Doppler-corrected magnitude; (2) the maximum infrared polarization is strongly correlated with the maximum optical polarization. Our conclusion is that the infrared polarization depends only on the degree of ordering of the magnetic field in the synchrotron emission regions and not on the beaming effect.Both infrared and optical emissions originate from the synchrotron radiation.