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Two Transient X-Ray Quasi-periodic Oscillations Separated by an Intermediate State in 1H 0707-495
Zhang, Peng-fei1,2; Zhang, Peng1,3; Liao, Neng-hui1; Yan, Jing-zhi1; Fan, Yi-zhong1,4; Liu, Qing-zhong1,4
2018-02-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume853Issue:2Pages:8
Corresponding AuthorZhang, Peng-fei(zhangpengfee@pmo.ac.cn)
AbstractIn the narrow-line Seyfert 1 galaxy 1H 0707-495, recently a transient quasi-periodic oscillation (QPO) signal with a frequency of similar to 2.6 x 10(-4) Hz has been detected at a high statistical significance. Here, we reanalyze the same set of XMM-Newton data observed on 2008 February 4 with the weighted-wavelet Z-transform method. In addition to confirming the previous findings, we also find another QPO signal with a frequency of similar to 1.2 x 10-4 Hz in a separated X-ray emission phase at the significance level of similar to 3.7 sigma. The signal is also found fitting an autoregressive model though at a lower significance. The frequency ratio between these two signals is similar to 2: 1. The analysis of other XMM-Newton measurements of 1H 0707-495 also reveals the presence of the similar to 2.6 x10(-4) Hz (similar to 1.2 x 10(-4) Hz) QPO signal on 2007 May 14 (2010 September 17) at the significance level of similar to 4.2 sigma (similar to 3.5 sigma). The QPO frequency found in this work follows the fQPO-MBH relation reported in previous works spanning from stellar mass to supermassive black holes. This is the first observation of two separated transient X-ray QPO signals in active galactic nuclei, which sheds a new light on the physics of accreting supermassive black holes.
Keywordgalaxies: active galaxies: individual (1H 0707-495) galaxies: nuclei X-rays: galaxies
DOI10.3847/1538-4357/aaa29a
WOS KeywordLINE SEYFERT-1 GALAXIES ; ACTIVE GALACTIC NUCLEI ; PHOTON IMAGING CAMERA ; BLACK-HOLE ; XMM-NEWTON ; CYGNUS X-1 ; EMISSION ; IDENTIFICATION ; INSTABILITY ; SPECTRA
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000424253400027
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22212
Collection中国科学院紫金山天文台
Corresponding AuthorZhang, Peng-fei
Affiliation1.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Yunnan Univ, Key Lab Astroparticle Phys Yunnan Prov, Kunming 650091, Yunnan, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100012, Peoples R China
4.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Peng-fei,Zhang, Peng,Liao, Neng-hui,et al. Two Transient X-Ray Quasi-periodic Oscillations Separated by an Intermediate State in 1H 0707-495[J]. ASTROPHYSICAL JOURNAL,2018,853(2):8.
APA Zhang, Peng-fei,Zhang, Peng,Liao, Neng-hui,Yan, Jing-zhi,Fan, Yi-zhong,&Liu, Qing-zhong.(2018).Two Transient X-Ray Quasi-periodic Oscillations Separated by an Intermediate State in 1H 0707-495.ASTROPHYSICAL JOURNAL,853(2),8.
MLA Zhang, Peng-fei,et al."Two Transient X-Ray Quasi-periodic Oscillations Separated by an Intermediate State in 1H 0707-495".ASTROPHYSICAL JOURNAL 853.2(2018):8.
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