Revisiting Radio Variability of the Blazar 3C 454.3
文献类型：期刊论文
| 作者 | Tripathi, Ashutosh2,3,4; Gupta, Alok C.5; Smith, Krista Lynne2,4; Wiita, Paul J.6; Aller, Margo F.1; Volvach, Alexandr E.7; Lahteenmaki, Anne8,9; Aller, Hugh D.1; Tornikoski, Merja8; Volvach, Larisa N.7 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 977期号:2页码:166 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad90e3 |
| 产权排序 | 2 |
| 英文摘要 | We examine lengthy radio light curves of the flat spectrum radio galaxy 3C 454.3 for possible quasiperiodic oscillations (QPOs). The data used in this work were collected at five radio frequencies, 4.8, 8.0, 14.5, 22.0, and 37.0 GHz between 1979 and 2013 as observed at the University of Michigan Radio Astronomical Observatory, Crimean Astrophysical Observatory, and Aalto University Mets & auml;hovi Radio Observatory. We employ generalized Lomb-Scargle periodogram and weighted wavelet transform analyses to search for periodicities in these light curves. We confirm a QPO period of similar to 2000 days to be at least 4 sigma significant using both methods at all five radio frequencies between 1979 and 2007, after which a strong flare changed the character of the light curve. We also find a similar to 600 day period, which is at least 4 sigma significant, but only in the 22.0 and 37.0 GHz light curves. We briefly discuss physical mechanisms capable of producing such variations. |
| WOS关键词 | QUASI-PERIODIC OSCILLATIONS ; GAMMA-RAY FLARE ; SPACE-TELESCOPE OBSERVATIONS ; ACTIVE GALACTIC NUCLEUS ; XMM-NEWTON OBSERVATIONS ; BLACK-HOLE ; LIGHT CURVES ; MULTIWAVELENGTH OBSERVATIONS ; BL LACERTAE ; OJ 287 |
| 资助项目 | NASA[NNX11AO13G] ; NASA[NNX13AP18G] ; NASA[80NSSC22K0741] ; National Science Foundation[AST-0607523] ; National Science Foundation[AST-2407604] ; University of Michigan ; [NNX09AU16G] ; [NNX10AP16G] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001374908300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | NASA ; National Science Foundation ; University of Michigan |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7269]  |
| 专题 | 天体化学研究团组 |
| 通讯作者 | Tripathi, Ashutosh |
| 作者单位 | 1.Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 USA 2.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamental, College Stn, TX 77843 USA 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China 4.Southern Methodist Univ, Dept Phys, 3215 Daniel Ave, Dallas, TX 75205 USA 5.Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263001, India 6.Coll New Jersey, Dept Phys, 2000 Pennington Rd, Ewing, NJ 08628 USA 7.Crimean Astrophys Observ, Radio Astron Lab, Katsiveli, Crimea, Ukraine 8.Aalto Univ, Metsahovi Radio Observ, Metsahovintie 114, Kylmala 02540, Finland 9.Aalto Univ, Dept Elect & Nanoengn, POB 15500, FI-00076 Aalto, Finland |
| 推荐引用方式 GB/T 7714 | Tripathi, Ashutosh,Gupta, Alok C.,Smith, Krista Lynne,et al. Revisiting Radio Variability of the Blazar 3C 454.3[J]. ASTROPHYSICAL JOURNAL,2024,977(2):166. |
| APA | Tripathi, Ashutosh.,Gupta, Alok C..,Smith, Krista Lynne.,Wiita, Paul J..,Aller, Margo F..,...&Volvach, Larisa N..(2024).Revisiting Radio Variability of the Blazar 3C 454.3.ASTROPHYSICAL JOURNAL,977(2),166. |
| MLA | Tripathi, Ashutosh,et al."Revisiting Radio Variability of the Blazar 3C 454.3".ASTROPHYSICAL JOURNAL 977.2(2024):166. |
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