PMO OpenIR  > 毫米波和亚毫米波技术实验室
Periodic radio variabilities of the blazar 1156+295: harmonic oscillations
Wang, Jun-Yi1,2; An, Tao3,4; Baan, Willem A.3; Lu, Xiang-Long2
2014-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume443Issue:1Pages:58-66
Abstract(Quasi)-periodic oscillations of the radio luminosity of a typical blazar 1156+295 were analysed to investigate the dynamic processes associated with the central engine of the active galactic nucleus. Three numerical techniques, the Lomb-Scargle periodogram, the Weighted Wavelet Z-transform and the improved Phase Dispersion Minimization, were used to search for candidate periodicities in the radio light curves of 1156+295 at 14.5, 8.0 and 4.8 GHz. The results of these methods are consistent with the detection of four periodic components with characteristic periods of similar to 1.7 (P-4), similar to 2.4 (P-3), similar to 3.4 (P-2) and similar to 7.5 yr (P-1), which suggest a harmonic relationship in frequency of 4: 3: 2: 1 with f(1) as the fundamental frequency. Except for the fact that P-1 persistently shows in the whole time span, the three others appear intermittent and are only prominent during certain time ranges. The second harmonic mode (P-2) is most powerful at all three observing frequency bands. The multiplicity and harmonic relation of the periodicities in 1156+295 reconfirms that global p-mode oscillations of the accretion disc are coupled to the jet. The oscillation of the disc is likely driven by Kelvin-Helmholtz instabilities in the inner edge of the accretion disc.
KeywordMethods: Statistical Galaxies: Active Quasars: Individual: 1156+295
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stu1135
WOS KeywordPHASE DISPERSION MINIMIZATION ; THICK ACCRETION DISCS ; BLACK-HOLE ; NRAO 530 ; OPTICAL OUTBURSTS ; WAVELET TRANSFORM ; TIME-SERIES ; SPACED DATA ; OJ 287 ; JET
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000339927000006
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15760
Collection毫米波和亚毫米波技术实验室
Affiliation1.Xiangtan Univ, Sch Math & Comp Sci, Xiangtan 411105, Hunan, Peoples R China
2.Guilin Univ Elect Technol, Key Lab Cognit Radio & Informat Proc, Guilin 541004, Peoples R China
3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jun-Yi,An, Tao,Baan, Willem A.,et al. Periodic radio variabilities of the blazar 1156+295: harmonic oscillations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,443(1):58-66.
APA Wang, Jun-Yi,An, Tao,Baan, Willem A.,&Lu, Xiang-Long.(2014).Periodic radio variabilities of the blazar 1156+295: harmonic oscillations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,443(1),58-66.
MLA Wang, Jun-Yi,et al."Periodic radio variabilities of the blazar 1156+295: harmonic oscillations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 443.1(2014):58-66.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Jun-Yi]'s Articles
[An, Tao]'s Articles
[Baan, Willem A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Jun-Yi]'s Articles
[An, Tao]'s Articles
[Baan, Willem A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Jun-Yi]'s Articles
[An, Tao]'s Articles
[Baan, Willem A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.