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Possible similar to 0.4 h X-ray quasi-periodicity from an ultrasoft active galactic nucleus
Song, J. R.1; Shu, X. W.1; Sun, L. M.1; Xue, Y. Q.2; Jin, C.3,4; Zhang, W. J.1; Jiang, N.2; Dou, L. M.5; Wang, T. G.2
2020-12-14
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume644Pages:8
AbstractRX J1301.9+2747 is an ultrasoft active galactic nucleus (AGN) with unusual X-ray variability that is characterized by a long quiescent state and a short-lived flare state. The X-ray flares are found to recur quasi-periodically on a timescale of 13-20 ks. Here, we report the analysis of the light curve in the quiescent state from two XMM-Newton observations spanning 18.5 years, along with the discovery of a possible quasi-periodic X-ray oscillation (QPO) with a period of similar to 1500 s. The QPO is detected at the same frequency in the two independent observations, with a combined significance of > 99.89%. The QPO is in agreement with the relation between frequency and black hole mass (M-BH) that has been reported in previous works for AGNs and Galactic black hole X-ray binaries (XRBs). The QPO frequency is stable over almost two decades, suggesting that it may correspond to the high-frequency type found in XRBs and originates, perhaps, from a certain disk resonance mode. In the 3:2 twin-frequency resonance model, our best estimate on the M-BH range implies that a maximal black hole spin can be ruled out. We find that all ultrasoft AGNs reported so far display quasi-periodicities in the X-ray emission, suggesting a possible link on the part of the extreme variability phenomenon to the ultrasoft X-ray component. This indicates that ultrasoft AGNs could be the most promising candidates in future searches for X-ray periodicities.
Keywordgalaxies: active X-rays: individuals: RX J1301 9+2747 black hole physics
Funding OrganizationChinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS
DOI10.1051/0004-6361/202039410
WOS KeywordBLACK-HOLE ; OSCILLATIONS ; GALAXIES ; STELLAR ; SIGNALS ; MASS
Language英语
Funding ProjectChinese NSF[11822301] ; Chinese NSF[11833007] ; Chinese NSF[U1731104] ; CAS Frontier Science Key Research Program[QYZDJ-SSW-SLH006] ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS[XDA15052100] ; [NSFC-11890693] ; [NSFC-11421303] ; [NSFC-11873054]
Funding OrganizationChinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS ; Chinese NSF ; Chinese NSF ; CAS Frontier Science Key Research Program ; CAS Frontier Science Key Research Program ; K.C. Wong Education Foundation ; K.C. Wong Education Foundation ; Strategic Pioneer Program on Space Science, CAS ; Strategic Pioneer Program on Space Science, CAS
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000599932600002
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/80271
Collection中国科学院国家天文台
Corresponding AuthorShu, X. W.
Affiliation1.Anhui Normal Univ, Dept Phys, Wuhu 241000, Anhui, Peoples R China
2.Univ Sci & Technol China, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
5.Guangzhou Univ, Dept Astron, Guangzhou 510006, Peoples R China
Recommended Citation
GB/T 7714
Song, J. R.,Shu, X. W.,Sun, L. M.,et al. Possible similar to 0.4 h X-ray quasi-periodicity from an ultrasoft active galactic nucleus[J]. ASTRONOMY & ASTROPHYSICS,2020,644:8.
APA Song, J. R..,Shu, X. W..,Sun, L. M..,Xue, Y. Q..,Jin, C..,...&Wang, T. G..(2020).Possible similar to 0.4 h X-ray quasi-periodicity from an ultrasoft active galactic nucleus.ASTRONOMY & ASTROPHYSICS,644,8.
MLA Song, J. R.,et al."Possible similar to 0.4 h X-ray quasi-periodicity from an ultrasoft active galactic nucleus".ASTRONOMY & ASTROPHYSICS 644(2020):8.
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