首页|A Possible X-ray Quasi-periodic Oscillation in the Narrow-line Seyfert 1 Galaxy Mrk 142
A Possible X-ray Quasi-periodic Oscillation in the Narrow-line Seyfert 1 Galaxy Mrk 142
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万方数据
维普
A possible quasi-periodic oscillation(QPO)at frequency 7.045 x 10-5 Hz is found in the narrow-line Seyfert 1 galaxy 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 0.3-0.6keV,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 x 10-5 Hz,and use a model to fit them.We find that the QPO signal mainly comes from the X-ray hot corona.
万方数据
维普
