A Possible X-ray Quasi-periodic Oscillation in the Narrow-line Seyfert 1 Galaxy Mrk 142  

作　　者：Xiao-Gu Zhong Jian-Cheng Wang Yong-Yun Chen Xiao-Ling Yu 

机构地区：[1]College of Physics and Electronic Engineering,Qujing Normal University,Qujing 655011,China [2]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China

出　　处：《Research in Astronomy and Astrophysics》2024年第6期191-200,共10页天文和天体物理学研究（英文版）

基　　金：financial supports from the Science Foundation of Department of Education of Yunnan Province (2024J0935)。

摘　　要：A possible quasi-periodic oscillation(QPO) at frequency 7.045 × 10^(-5) Hz is found in the narrow-line Seyfert 1galaxy Mrk 142 in the data of XMM-Newton collected on 2020 April 11.We find that the QPO signal is statistically significantly larger than the 5σ level and highly coherent with quality factor Q > 5 at the 0.3–10 keV band by using the method of the Lomb–Scargle Periodogram,the Weighted Wavelet Z-transform and the REDFIT.We analyze the data in 0.3–0.6 keV,0.6–1 keV,1–3 keV and 3–10 keV energy bands,and find obvious QPO signals at 0.3–0.6 keV and 1–3 keV bands.We then analyze the time-average spectra and time variability at the QPO frequency of 7.045 × 10^(-5) Hz,and use a model to fit them.We find that the QPO signal mainly comes from the X-ray hot corona.

关 键 词：X-rays:galaxies galaxies:Seyfert ACCRETION accretion disks radiation mechanisms:general 

分 类 号：P15[天文地球—天文学] P172.2