Blazar天体的红外偏振和变化研究  

Infrared Polarization and Infrared Variability of Blazar

作　　者：毛李胜[1] 谢光中[2] 张雄[1] 张彬彬[2] 

机构地区：[1]云南师范大学,昆明650092 [2]中国科学院国家天文台云南天文台

出　　处：《天文学报》2006年第2期131-143,共13页Acta Astronomica Sinica

基　　金：国家自然科学基金(10363002);云南师范大学自然科学研究青年基金资助

摘　　要：利用多波段同时性观测数据,研究了Blazar天体的近红外波段偏振与光学波段偏振的关系,发现两个波段的偏振度和偏振角之间都存在着很强的线性相关性．另外,两个波段的辐射流量也强烈相关．结果表明Blazr天体的近红外辐射主要来自于相对论电子的同步辐射,且与光学波段辐射来自于同一辐射区域．另外,利用2MASS数据还研究了近红外波段3个色指数J-H、H-K和J-K之间的相关性,发现J-H和H-K都与J-K强相关,但J-H与H-K之间没有相关性．最后研究了色指数-星等关系,表明在近红外波段Blazar天体变亮时谱形变平．The correlation of the polarization in near-infrared and optical bands is studied by using the simultaneous observational data. It is found that the polarization degree, polarization angle and flux intensity of the near-infrared band are strongly correlated with those of the optical band. Therefore it is concluded that the near-infrared emission and polarization of blazars are mainly from synchrotron radiation. Finally, the correlations between J-H, H-K and J-K and the correlation between the near-infrared color indices and the magnitudes arw also studied.

关 键 词：蝎虎天体:一般 偏振 红外:星系 辐射机制:非热 

分 类 号：P157[天文地球—天文学]