SIMBAD references

2018ApJ...860L..10S - Astrophys. J., 860, L10-L10 (2018/June-2)

Evidence for an optical low-frequency quasi-periodic oscillation in the Kepler light curve of an active galaxy.


Abstract (from CDS):

We report evidence for a quasi-periodic oscillation (QPO) in the optical light curve of KIC 9650712, a narrow-line Seyfert 1 galaxy in the original Kepler field. After the development and application of a pipeline for Kepler data specific to active galactic nuclei (AGNs), one of our sample of 21 AGNs selected by infrared photometry and X-ray flux demonstrates a peak in the power spectrum at log ν = -6.58 Hz, corresponding to a temporal period of t = 44 days. We note that although the power spectrum is well fit by a model consisting of a Lorentzian and a single power law, alternative continuum models cannot be ruled out. From optical spectroscopy, we measure the black hole mass of this AGN as log (MBH/M) = 8.17. We find that this frequency lies along a correlation between low-frequency QPOs and black hole mass from stellar and intermediate mass black holes to AGNs, similar to the known correlation in high-frequency QPOs.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): accretion, accretion disks - galaxies: active - galaxies: Seyfert

Simbad objects: 14

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