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

Abstract

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 \emph{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 $2.19\times 10^{-4}\mathrm{Hz}$ (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 ($f_{\mathrm{QPO}}$) and the mass of the central black hole ($M_{\mathrm{BH}}$) 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.

6 pages, 5 figures, 1 table

References in corpus (16)

• X-ray Properties of Black-Hole Binaries
• Assessing statistical significance of periodogram peaks
• Occultation measurement of the size of the X-ray emitting region in the Active Galactic Nucleus of NGC 1365
• BASS XXII: The BASS DR2 AGN Catalog and Data
• SFI++ II: A New I-band Tully-Fisher Catalog, Derivation of Peculiar Velocities and Dataset Properties
• Discovery of a ~2 hr high frequency X-ray QPO and iron K alpha reverberation in the active galaxy MS 2254.9-3712
• Wavelets: a powerful tool for studying rotation, activity, and pulsation in Kepler and CoRoT stellar light curves
• Black hole mass and spin measurements through the Relativistic Precession Model: XTE J1859+226
• Probing the Physics of Narrow Line Regions in Active Galaxies IV: Full data release of The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)
• X-ray spectral variability of Seyfert 2 galaxies
• Universal scaling of the 3:2 twin-peak quasi-periodic oscillation frequencies with black hole mass and spin revisited
• An X-ray periodicity of $\sim$1.8 hours in a narrow-line Seyfert 1 galaxy Mrk 766
• Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365
• Quasi periodic whispers from a transient ULX in M\,101: signatures of a fast-spinning neutron star?
• Multi-wavelength study of NGC 1365: The obscured active nucleus and off-nuclear compact X-ray sources
• Intermittent QPO properties of MAXI J1820+070 revealed by Insight-HXMT

Cited by in corpus (3)

• Detection and Characterization of Quasi-Periodic Oscillations in Seyfert Galaxy NGC 4151
• X-ray Quasi-Periodic Oscillations in Active Galactic Nuclei and Their Implications for the Changing Look Phenomenon
• A supermassive black hole under the radar: Repeating X-ray variability in a Seyfert galaxy