Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 454, Issue 4, Pages 4277-4281Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv2284
Keywords
galaxies: active; galaxies: individual: NGC7469; galaxies: jets; galaxies: nuclei; radio continuum: galaxies; X-rays: galaxies
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Funding
- I-CORE program of the Planning and Budgeting Committee
- Israel Science Foundation [1937/12, 1163/10]
- Israel's Ministry of Science and Technology
- Lady Davis Foundation
- European Unions Horizon research and innovation programme under the Marie Sklodowska-Curie grant [655324]
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We report short-cadence monitoring of a radio-quiet (RQ) Active Galactic Nuclei (AGN), NGC 7469, at 95 GHz (3 mm) over a period of 70 d with the CARMA telescope. The AGN varies significantly (+/- 3 sigma from the mean) by a factor of 2 within 4-5 d. The intrinsic 95 GHz variability amplitude in excess of the measurement noise (10 per cent) 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 disc corona.
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