1. Infrared polarization and variability of blazarst
- Author
-
Xie Guang-zhong, Zhang Bin-bin, Mao Li-sheng, and Zhang Xiong
- Subjects
Physics ,Infrared ,business.industry ,Astrophysics::High Energy Astrophysical Phenomena ,Synchrotron radiation ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Electron ,Radiation ,Polarization (waves) ,Color index ,Optics ,Space and Planetary Science ,Thermal infrared spectroscopy ,business ,Blazar ,Astrophysics::Galaxy Astrophysics - Abstract
Correlation between the polarizations in the near-infrared and optical wavebands is studied with simultaneous observational data of blazars. It is found that the degree and angle of polarization in the near-infrared are correlated strongly with those in the optical. And so are the radiation fluxes at the two wavebands. It follows that the near-infrared radiation and polarization of blazars are mainly from synchrotron radiation of relativistic electrons, and come from the same region as the optical waveband. Correlations between the three near-infrared color indices J-H, H-K and J-K are also studied using the 2MASS data. It is found that both J-H and H-K are strongly correlated with J-K, while there is no correlation between J-H and H-K. Lastly, we studied the color index magnitude relationship and found that the near-infrared spectrum gets flatter as the source gets brighter.
- Published
- 2006