Blazar天体的光变和偏振  

Polarization and variations of Blazar

作　　者：刘云[1] 张雄[1] 郑永刚[1] 王孝民[1] 鲍玉英[1] 

机构地区：[1]云南师范大学物理与电子信息学院,昆明650092

出　　处：《物理学报》2007年第9期5558-5563,共6页Acta Physica Sinica

基　　金：国家自然科学基金项目(批准号:10363002);教育部科学技术研究重点项目(批准号:02142);云南省自然科学基金(批准号:2004A0027M)资助的课题.~~

摘　　要：从已有文献中收集了一定数量的有关Blazar天体的数据,分析光变、偏振度以及核优参数之间的相关性,结果表明光变和偏振及核优参数之间有一定的关系,这可能暗示Blazar天体存在着聚束效应.Blazar is an extreme subset of AGNs,constituting less than a few percent of the known AGN population. While Blazar have some properties in common with other AGNs,they have some characteristics that set them apart. The observation properties are probably the cause of strong beaming effect,and these properties would be mutually correlated. The relationship between the polarization and the magnitude variation in brightness,as well as the core-dominance parameter are derived and used statistically to compare with the observational data of Blazar smaples. The result suggests that the polarization, variation and the core-dominance parameters are possible indications of the beaming effect.

关 键 词：BLAZAR天体 光变幅度 偏振度 核优参数 

分 类 号：P141.4[天文地球—天体物理]