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Interstellar scintillation, ISS, and intrinsic variability of radio AGN


Jauncey, DL and Koay, JY and Bignall, HE and Macquart, JP and Pursimo, T and Giroletti, M and Hovatta, T and Kiehlmann, S and Rickett, BJ and Readhead, A and Max-Moerbeck, W and Vedantham, H and Reynolds, C and Lovell, J and Ojha, R and Kedziora-Chudczer, L, Interstellar scintillation, ISS, and intrinsic variability of radio AGN, Advances in Space Research, 65, (2) pp. 756-762. ISSN 0273-1177 (2020) [Refereed Article]

Copyright Statement

Copyright 2019 Published by Elsevier Ltd on behalf of COSPAR.

DOI: doi:10.1016/j.asr.2019.05.003


We investigate the relationship between the 5 GHz interstellar scintillation (ISS) and the 15 GHz intrinsic variability of the compact, radio-selected active galactic nuclei (AGN) common to the Microarcsecond Scintillation-Induced Variability (MASIV) Survey and the Owens Valley Radio Observatory blazar flux density monitoring program. As part of this investigation, we also re-examine the reported intrinsic nature of the February 1990 VLA observations of the blazar S5 0716+714. We are also examining the presence of IDV/ISS in the Owens Valley 15 GHz flux density monitoring data. We find a significant relationship between the Owens Valley 15 GHz modulation index and the MASIV modulation index. We also discuss the implications of these findings for RadioAstron. (C) 2019 Published by Elsevier Ltd on behalf of COSPAR.

Item Details

Item Type:Refereed Article
Keywords:active galactic nuclei, radio continuum, quasars, variability, interstellar scintillation
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Jauncey, DL (Dr D Jauncey)
UTAS Author:Bignall, HE (Dr Hayley Bignall)
UTAS Author:Lovell, J (Dr Jim Lovell)
ID Code:152776
Year Published:2020
Web of Science® Times Cited:5
Deposited By:Physics
Deposited On:2022-08-24
Last Modified:2022-09-08

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