Radio variability properties of a sample of 168 radio sources: Periodicity analysis

被引：2
|
作者：
Fan, J. H. [1 ]
Liu, Y.
Yuan, Y. H.
Wang, H. G.
Wang, Y. X.
Gupta, A. C.
Yang, J. H.
Li, J.
Zhou, J. L.
Xu, S. X.
Chen, J. L.
Liu, F.
Li, Y. Z.
机构：
[1] Guangzhou Univ, Ctr Astrophys, Guangzhou 510400, Peoples R China
[2] Hunan Normal Univ, Inst Phys, Changsha, Peoples R China
[3] Guangzhou Univ, Coll Sci & Trade, Guangzhou 511442, Peoples R China
[4] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[5] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India
[6] Hunan Univ Arts & Sci, Dept Phys & Elect Sci, Changde 415000, Peoples R China
来源：
CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS | 2006年 / 6卷
关键词：
galaxies : blazars; radio continuum : general; methods : data analysis;
D O I：
10.1088/1009-9271/6/S2/62
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this work, using the data base at the University of Michigan Radio Astronomy Observatory (UMRAO) at 8 GHz, we investigated the possible periodicity in the radio light curves using Jurkevich analysis method. The results show that the radio sources display a possibly physically significant periodicity in a range of 0.08 to 14.5 years. Besides, the radio spectral indexes are also calculated, the results show that the averaged radio spectral index is alpha(14.5)(4.8) = -0.15 (f(nu) proportional to nu(alpha)) for flat spectrum radio quasars (FSRQs) and alpha(14.5)(4.8)=0.01 for BL Lacertae objects. Some discussions are included.
引用
收藏
页码：333 / 336
页数：4
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