An X-ray high-frequency quasi-periodic oscillation in NGC 1365

被引：1
|
作者：
Yan, Y. K. [1 ]
Zhang, P. [1 ,2 ]
Liu, Q. Z. [3 ]
Chang, Z. [4 ]
Liu, G. C. [1 ,2 ]
Yan, J. Z. [3 ]
Zeng, X. Y. [1 ,2 ]
机构：
[1] China Three Gorges Univ, Coll Sci, Yichang 443002, Peoples R China
[2] China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443002, Peoples R China
[3] Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
[4] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China
来源：
ASTRONOMY & ASTROPHYSICS | 2024年 / 691卷
基金：
中国国家自然科学基金;
关键词：
galaxies: active; galaxies: individual: NGC 1365; galaxies: nuclei; X-rays: galaxies; BLACK-HOLE MASS; EXTRAGALACTIC DISTANCE SCALE; ACTIVE GALACTIC NUCLEI; TELESCOPE KEY PROJECT; SPECTRAL VARIABILITY; LIGHT CURVES; DATA RELEASE; LINE; MODEL; INSTABILITY;
D O I：
10.1051/0004-6361/202450875
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
This study presents the detection of a high-frequency quasi-periodic oscillation (QPO) in the Seyfert galaxy NGC 1365 based on observational data obtained by XMM-Newton in January 2004. Utilizing the weighted wavelet Z-transform (WWZ) and Lomb-Scargle periodogram (LSP) methods, a QPO signal is identified at a frequency of 2.19 x 10(-4) Hz (4566 s), with a confidence level of 3.6 sigma. The signal is notably absent in the lower 0.2-1.0 keV energy band, with the primary contribution emerging from the 2.0-10.0 keV band, where the confidence level reaches 3.9 sigma. Spectral analysis shows that there are multiple absorption and emission lines in the high-energy band (> 6 keV). The correlation between the QPO frequency (f(QPO)) and the mass of the central black hole (M-BH) of NGC 1365 aligns with the established logarithmic trend observed across black holes, indicating the QPO is of high frequency. This discovery provides new clues for studying the generation mechanism of QPOs in Seyfert galaxies, which helps us understand the accretion process around supermassive black holes and the characteristics of strong gravitational fields in active galactic nuclei.
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页数：6
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