Millimeter-band variability of the radio-quiet nucleus of NGC7469

Abstract

We report short-cadence monitoring of a radio-quiet Active Galactic Nuclei (AGN), NGC7469, at 95 GHz (3 mm) over a period of 70 days with the CARMA telescope. The AGN varies significantly ($\pm 3\sigma$ from the mean) by a factor of two within 4-5 days. The intrinsic 95 GHz variability amplitude in excess of the measurement noise (10%) and relative to the mean flux is comparable to that in the X-rays, and much higher than at 8.4 GHz. The mm-band variability and its similarity to the X-ray variability adds to the evidence that the mm and X-ray emission have the same physical origin, and are associated with the accretion disk corona.

6 pages, 3 figures, accepted for publication in MNRAS

References in corpus (7)

• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
• On the origin of radio emission in radio quiet quasars
• A Survey of Kiloparsec-Scale Radio Outflows in Radio-Quiet Active Galactic Nuclei
• Radio Variability in Seyfert Nuclei
• Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006--2007 outburst
• Discovery of Millimeter-Wave Excess Emission in Radio-Quiet Active Galactic Nuclei
• The millimeter-wave continuum spectrum of Centaurus A and its nucleus

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