Interstellar scintillation, ISS, and intrinsic variability of radio AGN

Article

Jauncey, David L., Koay, Jun Yi, Bignall, Hayley, Macquart, Jean-Pierre, Pursimo, Tapio, Giroletti, Marcello, Hovatta, Talvikki, Kiehlmann, Sebastian, Rickett, Barney, Readhead, Anthony, Max-Moerbeck, Walter, Vedantham, Harish, Reynolds, Cormac, Lovell, James, Ojha, Roopesh and Kedziora-Chudczer, Lucyna. 2020. "Interstellar scintillation, ISS, and intrinsic variability of radio AGN." Advances in Space Research. 65 (2), pp. 756-762. https://doi.org/10.1016/j.asr.2019.05.003
Article Title

Interstellar scintillation, ISS, and intrinsic variability of radio AGN

ERA Journal ID1950
Article CategoryArticle
AuthorsJauncey, David L. (Author), Koay, Jun Yi (Author), Bignall, Hayley (Author), Macquart, Jean-Pierre (Author), Pursimo, Tapio (Author), Giroletti, Marcello (Author), Hovatta, Talvikki (Author), Kiehlmann, Sebastian (Author), Rickett, Barney (Author), Readhead, Anthony (Author), Max-Moerbeck, Walter (Author), Vedantham, Harish (Author), Reynolds, Cormac (Author), Lovell, James (Author), Ojha, Roopesh (Author) and Kedziora-Chudczer, Lucyna (Author)
Journal TitleAdvances in Space Research
Journal Citation65 (2), pp. 756-762
Number of Pages7
Year2020
Place of PublicationUnited Kingdom
ISSN0273-1177
Digital Object Identifier (DOI)https://doi.org/10.1016/j.asr.2019.05.003
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S0273117719303138
Abstract

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.

KeywordsActive galactic nuclei, Radio continuum: Quasars, Variability, Interstellar scintillation
ANZSRC Field of Research 2020510109. Stellar astronomy and planetary systems
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Byline AffiliationsCommonwealth Scientific and Industrial Research Organisation (CSIRO), Australia
Academia Sinica, Taiwan
Curtin University
Nordic Optical Telescope, Spain
National Institute for Astrophysics, Italy
University of Turku, Finland
California Institute of Technology (Caltech), United States
University of California, United States
University of Chile, Chile
University of Tasmania
National Aeronautics and Space Administration (NASA), United States
Computational Engineering and Science Research Centre
Institution of OriginUniversity of Southern Queensland
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