An X-Ray Periodicity of ~1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766
Zhang,Peng1,2; Zhang,Peng-fei1,3; Yan,Jing-zhi1; Fan,Yi-zhong1,4; Liu,Qing-zhong1,4
Source PublicationThe Astrophysical Journal
AbstractAbstract In the narrow-line Seyfert 1 galaxy Mrk 766, a quasi-periodic oscillation (QPO) signal with a period of ~6450 s is detected in the XMM-Newton data collected on 2005 May 31. This QPO signal is highly statistically significant at the ~5σ confidence level, with a quality factor of Q = f / Δ f > 13.6 . The X-ray intensity changed by a factor of 3, with a root mean square fractional variability of 14.3%. Furthermore, this QPO signal is present in the data of all three EPIC detectors and two RGS cameras and its frequency follows the f QPO – M BH relation spanning from stellar-mass to supermassive black holes. Interestingly, a possible QPO signal with a period of ~4200 s had been reported in the literature. The frequency ratio of these two QPO signals is ~3:2. Our result is also in support of the hypothesis that the QPO signals can just be transient. The spectral analysis reveals that the contribution of the soft excess component below ~1 keV is different between epochs with and without QPO. This property, as well as the former frequency ratio, are well-detected in X-ray BH binaries, which may shed some light on the physical origins of our event.
Keywordgalaxies: active galaxies: individual (Mrk 766) galaxies: nuclei X-rays: galaxies
WOS IDIOP:0004-637X-849-1-aa8d6e
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China,,,
2.University of Chinese Academy of Sciences, Beijing, 100012, China
3.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China
4.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, China
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GB/T 7714
Zhang,Peng,Zhang,Peng-fei,Yan,Jing-zhi,等. An X-Ray Periodicity of ~1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766[J]. The Astrophysical Journal,2017,849(1).
APA Zhang,Peng,Zhang,Peng-fei,Yan,Jing-zhi,Fan,Yi-zhong,&Liu,Qing-zhong.(2017).An X-Ray Periodicity of ~1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766.The Astrophysical Journal,849(1).
MLA Zhang,Peng,et al."An X-Ray Periodicity of ~1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766".The Astrophysical Journal 849.1(2017).
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