| 3C446光变的α-P环分析 |
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| 引用本文： | 郭宁莉,张心瑜,张冠军,袁聿海,杨江河.3C446光变的α-P环分析[J].湖南文理学院学报(自然科学版),2016,28(2). |
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| 作者姓名： | 郭宁莉 张心瑜 张冠军 袁聿海 杨江河 |
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| 作者单位： | 广州大学 物理与电子工程学院，广东 广州，510006;湖南文理学院 物理与电子科学学院，湖南 常德，415000 |
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| 基金项目： | 国家自然科学基金(NSFC 11403006;U1431112)，湖南省自然科学基金(2015JJ2104)，湖南文理学院科研重点项目(JJZD201101)，广州大学大学生创新训练项目。 |
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| 摘 要： | 从UMRAO(University of Michigan Radio Astronomy Observatory)获得了3C 446射电4.8、8.0、14.5 GHz波段的长时间观测数据——流量密度和偏振度P,计算了射电谱指数,并根据谱指数给出了谱变参数β。研究了偏振度P4.8 GHz与谱变参数β之间的关系,结果表明:β与P4.8 GHz之间存在弱相关,相关系数r=0.21,差异性水平p=4.2%;β和P4.8 GHz的关系可以用椭圆曲线拟合,按照时间序列,拟合椭圆沿逆时针方向变化;β和P4.8 GHz的2个关系椭圆环存在的时间间隔分别是3.38 yr和12.54 yr。
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| 关 键 词： | 耀变体 3C446 光变 |
The analysis of optical variability based on α-P circle for 3C 446 |
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| Guo Ningli,Zhang Xinyu,Zhang Guanjun,Yuan Yuhai,Yang Jianghe.The analysis of optical variability based on α-P circle for 3C 446[J].Journal of Hunan University of Arts and Science:Natural Science Edition,2016,28(2). |
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| Authors: | Guo Ningli Zhang Xinyu Zhang Guanjun Yuan Yuhai Yang Jianghe |
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| Abstract: | The flux density and polarized variance at radio 4.8, 8.0 and 14.5 GHz are obtained from UMRAO for 3C 446. The spectral index (α) is calculated through the radio flux density, and used to calculate the spectral variable parameter β. The relations between polarized variance (P4.8 GHz) and spectral variable parameter β are discussed. The main results are as the following: β and P4.8 GHz show weak correlation, with the correlation coefficient r = 0.21, and the chance probability p = 4.2%; the relation between β and P4.8 GHz can be fitted by the elliptic curve which is implicitly time dependent; the periodicities calculated from the polarized variance are 3.38 years and 12.54 years. |
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| Keywords: | Blazars 3C 446 optical variability |
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