An X-Ray Periodicity of ～1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766

doi:10.3847/1538-4357/aa8d6e

	An X-Ray Periodicity of ～1.8 hr in Narrow-line Seyfert 1 Galaxy Mrk 766
	Zhang,Peng 1,2; Zhang,Peng-fei 1,3; Yan,Jing-zhi 1; Fan,Yi-zhong 1,4; Liu,Qing-zhong 1,4
刊名	The Astrophysical Journal
	2017-10-24
卷号	849 期号:1
关键词	galaxies: active galaxies: individual (Mrk 766) galaxies: nuclei X-rays: galaxies
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa8d6e
英文摘要	Abstract 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.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-849-1-aa8d6e
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/23731]
专题	中国科学院紫金山天文台
作者单位	1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China zhangpengfee@pmo.ac.cn, jzyan@pmo.ac.cn, yzfan@pmo.ac.cn, liuqz@pmo.ac.cn 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
推荐引用方式 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).