X-ray Fluctuation Power Spectral Densities of Seyfert 1 Galaxies

Abstract

By combining complementary monitoring observations spanning long, medium and short time scales, we have constructed power spectral densities (PSDs) of six Seyfert~1 galaxies. These PSDs span $\gtrsim$4 orders of magnitude in temporal frequency, sampling variations on time scales ranging from tens of minutes to over a year. In at least four cases, the PSD shows a "break," a significant departure from a power law, typically on time scales of order a few days. This is similar to the behavior of Galactic X-ray binaries (XRBs), lower mass compact systems with breaks on time scales of seconds. NGC 3783 shows tentative evidence for a doubly-broken power law, a feature that until now has only been seen in the (much better-defined) PSDs of low-state XRBs. It is also interesting that (when one previously-observed object is added to make a small sample of seven), an apparently significant correlation is seen between the break time scale $T$ and the putative black hole mass $M_{\mathrm{BH}}$, while none is seen between break time scale and luminosity. The data are consistent with the linear relation $ T = M_{\rm BH}/10^{6.5} \Msun$; extrapolation over 6--7 orders of magnitude is in reasonable agreement with XRBs. All of this strengthens the case for a physical similarity between Seyfert~1s and XRBs.

27 pages, 13 figures. Accepted for publication in ApJ. Typo corrected

References in corpus (29)

• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Advection-Dominated Accretion: A Self-Similar Solution
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• RXTE Observation of Cygnus X-1: II. Timing Analysis
• Measuring the broadband power spectra of active galactic nuclei with RXTE
• X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180
• Keplerian Motion of Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
• A Comprehensive Spectral and Variability Study of Narrow-Line Seyfert 1 Galaxies Observed by ASCA: II. Spectral Analysis and Correlations
• The flux-dependent amplitude of broadband noise variability in X-ray binaries and active galaxies
• The Ionized Gas and Nuclear Environment in NGC 3783. I. Time-Averaged 900 ks Chandra Grating Spectroscopy
• Soft state of Cygnus X-1: stable disk and unstable corona
• Spectral evolution of magnetic flares and time lags in accreting black hole sources
• High-Resolution X-ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in NGC 3783
• A Cutoff in the X-ray Fluctuation Power Density Spectrum of the Seyfert 1 Galaxy NGC 3516
• On X-ray Variability in Seyfert Galaxies
• Black Holes and Hosts of Active and Quiescent Galaxies: I. The Black Hole-Bulge Relation revisited
• A multi-wavelength study of the Seyfert 1 galaxy MCG-6-30-15
• Low Luminosity States of the Black Hole Candidate GX~339--4. II. Timing Analysis
• Frequency-dependent time lags in the X-ray emission of the Seyfert galaxy NGC 7469
• Low Luminosity States of the Black Hole Candidate GX 339-4. I. ASCA and Simultaneous Radio/RXTE Observations
• Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. II. Ultraviolet Continuum and Emission-line Variability
• An RXTE Survey of Long-Term X-ray Variability in Seyfert 1 Galaxies
• Temporal characteristics of the X-ray emission of NGC 7469
• Detection of a high frequency break in the X-ray power spectrum of Ark 564
• On the lack of X-ray iron line reverberation in MCG-6-30-15: Implications for the black hole mass and accretion disk structure
• Characterising the complex absorber in NGC 4151
• X-ray Power Density Spectrum of the Narrow Line Seyfert 1 Galaxy Akn 564
• The Flight Spectral Response of the ACIS Instrument
• The Spectral Energy Distribution of the Seyfert galaxy Ton S180

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