Periodic radio variabilities in NRAO 530: a jet-disc connection?
文献类型：期刊论文
| 作者 | An, Tao1,2 ; Baan, Willem A.1; Wang, Jun-Yi3,4; Wang, Yu1; Hong, Xiao-Yu1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2013-10-01 |
| 卷号 | 434期号:4页码:3487-3496 |
| 关键词 | methods: statistical galaxies: active quasars: individual: NRAO 530 |
| 英文摘要 | Time series analysis techniques, Lomb-Scargle periodogram and weighted wavelet Z-transform, have been employed to search for year-time-scale periodicities from the radio light curves of a typical blazar NRAO 530. The periodicity analysis using the two methods show consistent results: two strong and persistent periods of similar to 10 and similar to 6 yr are prominent at all three wavelengths; three other weaker periodicities with shorter time-scales (similar to 5, similar to 3.5 and similar to 3 yr) were also seen; in addition, the 14.5-GHz WWZ power spectrum revealed a similar to 2-yr periodic component during the time interval 1983-1990. Statistical significance analysis suggests that these periodicities might result from physically periodic process. The characteristic frequencies of these periodicities seem to have a harmonic relationship, and the fundamental frequency, i.e. the first-order harmonic, is about 0.05 yr(-1) (P-0 = 20 yr). But the fundamental frequency was not pronounced. The multiplicity and apparent harmonic relationship of the periodicities could be interpreted by the global p-mode oscillation of the accretion disc, if the jet and disc are coupled. In this scenario, the periodic fluctuations in the accretion rate consequently lead to the observed periodic variabilities of the radio luminosity. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ADVECTION-DOMINATED ACCRETION ; UNEVENLY SPACED DATA ; TIME-SERIES ANALYSIS ; BL LACERTAE OBJECTS ; X-RAY BINARIES ; BLAZAR OJ 287 ; BLACK-HOLE ; OPTICAL OUTBURSTS ; GALACTIC NUCLEI ; NEUTRON-STARS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325262300063 |
| 公开日期 | 2014-08-15 |
| 源URL | [http://119.78.226.72//handle/331011/14993]  |
| 专题 | 上海天文台_空间导航与定位技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Guilin Univ Elect Technol, Minist Educ, Key Lab Cognit Radio & Informat Proc, Guilin 541004, Peoples R China 4.Xiangtan Univ, Sch Math & Comp Sci, Xiangtan 411105, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | An, Tao,Baan, Willem A.,Wang, Jun-Yi,et al. Periodic radio variabilities in NRAO 530: a jet-disc connection?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,434(4):3487-3496. |
| APA | An, Tao,Baan, Willem A.,Wang, Jun-Yi,Wang, Yu,&Hong, Xiao-Yu.(2013).Periodic radio variabilities in NRAO 530: a jet-disc connection?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,434(4),3487-3496. |
| MLA | An, Tao,et al."Periodic radio variabilities in NRAO 530: a jet-disc connection?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 434.4(2013):3487-3496. |
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来源：上海天文台
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