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Interstellar Scintillation, ISS, and Intrinsic Variability of Radio AGN

Jauncey, David L. and Koay, Jun Yi and Bignall, Hayley and Macquart, Jean-Pierre and Pursimo, Tapio and Giroletti, Marcello and Hovatta, Talvikki and Kiehlmann, Sebastian and Rickett, Barney and Readhead, Anthony and Max-Moerbeck, Walter and Vedantham, Harish and Reynolds, Cormac and Lovell, James and 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. ISSN 0273-1177. https://resolver.caltech.edu/CaltechAUTHORS:20190515-102837886

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.asr.2019.05.003DOIArticle
ORCID:
AuthorORCID
Koay, Jun Yi0000-0002-7029-6658
Macquart, Jean-Pierre0000-0001-6763-8234
Hovatta, Talvikki0000-0002-2024-8199
Kiehlmann, Sebastian0000-0001-6314-9177
Readhead, Anthony0000-0001-9152-961X
Max-Moerbeck, Walter0000-0002-5491-5244
Vedantham, Harish0000-0002-0872-181X
Reynolds, Cormac0000-0002-1510-4860
Additional Information:© 2019 Published by Elsevier Ltd on behalf of COSPAR. Received 4 February 2019, Revised 29 April 2019, Accepted 1 May 2019, Available online 13 May 2019.
Group:Astronomy Department
Subject Keywords:Active galactic nuclei; Radio continuum: Quasars; Variability; Interstellar scintillation
Issue or Number:2
Record Number:CaltechAUTHORS:20190515-102837886
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190515-102837886
Official Citation:David L. Jauncey, Jun Yi Koay, Hayley Bignall, Jean-Pierre Macquart, Tapio Pursimo, Marcello Giroletti, Talvikki Hovatta, Sebastian Kiehlmann, Barney Rickett, Anthony Readhead, Walter Max-Moerbeck, Harish Vedantham, Cormac Reynolds, James Lovell, Roopesh Ojha, Lucyna Kedziora-Chudczer, Interstellar scintillation, ISS, and intrinsic variability of radio AGN, Advances in Space Research, Volume 65, Issue 2, 2020, Pages 756-762, ISSN 0273-1177, https://doi.org/10.1016/j.asr.2019.05.003. (http://www.sciencedirect.com/science/article/pii/S0273117719303138)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95508
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 May 2019 23:04
Last Modified:09 Mar 2020 13:19

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