ESO 113-G010的一对准周期振荡信号
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1.中国科学院紫金山天文台暗物质与空间天文重点实验室南京210033;2.中国科学院大学北京100049;3.中国科学技术大学空间科学与天文学院合肥230026)

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国家自然科学基金项目(11433009、11573071、11673067、11733009)资助


Two Quasi-periodic Oscillations in ESO 113-G010
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1. Key Laboratory for Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033;2. University of Chinese Academy of Sciences, Beijing 100049;3. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026;

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    摘要:

    2005年11月XMM-Newton望远镜对窄线赛弗特星系ESO 113-G010进行了长达 100ks的观测. 采用Lomb-Scargle周期图(LSP)法和 加权小波Z变换(Weighted Wavelet Z-transform, WWZ)两种方法对数据进行分析, 发现存在着sim2.24 h和sim4.09 h准周期振荡(Quasi-Periodic Oscillation, QPO), 其置信度分别为7.3sigma和4.8sigma. 这两个QPO信号的周期具有大约1:2 (1:1.83)的关系. 在该源的其他的观测中并没有发现QPO信号, 表明这是一种暂现现象. ESO 113-G010中心黑洞的质量$ M_{\rm BH

    Abstract:

    In the Narrow-line Seyfert Galaxy (NLS1) ESO 113-G010, two Quasi-Periodic Oscillation (QPO) signals are detected in the XMM-Newton data collected in 2005 November. XMM-Newton has an exposure more than 100 ks in the energy range 0.3--10keV. The data was analyzed using the Lomb-Scargle Periodogram (LSP) and the Weighted Wavelet Z-transform (WWZ) method. It was found that there were sim2.24hours and sim4.09hours QPO in the observations with the confidence of 7.3sigma and 4.8sigma, respectively. The two QPO signals have a relationship of approximately 1:2 (1:1.83). The absence of QPOs in other observations of the object suggests that it is a transient phenomenon. The relationship between the mass of the ESO 113-G010 central black hole (BH) $M_BH$ and its frequency $ f_QPO$ satisfies the similar logarithmic linear relationship in highly accreting BH systems, from BH X-ray binaries to supermassive BHs. The energy spectrum analysis reveals that the source has a soft excess below 1keV.

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张鹏,颜景志,刘庆忠. ESO 113-G010的一对准周期振荡信号[J].天文学报,2020,61(1):2. ZHANG Peng, YAN Jing-zhi, LIU Qing-zhong. Two Quasi-periodic Oscillations in ESO 113-G010[J]. Acta Astronomica Sinica,2020,61(1):2.

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  • 收稿日期:2019-05-28
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  • 在线发布日期: 2020-01-21
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