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Multiband cross-correlated radio variability of the blazar 3C 279

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dc.contributor.author Mohana A, Krishna
dc.contributor.author Gupta, Alok C.
dc.contributor.author Marscher, Alan P.
dc.contributor.author Sotnikova, Yulia V.
dc.contributor.author Jorstad, S. G.
dc.contributor.author Wiita, Paul J.
dc.contributor.author Cui, Lang
dc.contributor.author Aller, Margo F.
dc.contributor.author Aller, Hugh D.
dc.contributor.author Kovalev, Yu. A.
dc.contributor.author Kovalev, Y. Y.
dc.contributor.author Liu, Xiang
dc.contributor.author Mufakharov, T. V.
dc.contributor.author Popkov, A. V.
dc.contributor.author Mingaliev, M. G.
dc.contributor.author Erkenov, A. K.
dc.contributor.author Nizhelsky, N. A.
dc.contributor.author Tsybulev, P. G.
dc.contributor.author Tsybulev, P. G.
dc.contributor.author Zhao, Wei
dc.contributor.author Weaver, Z. R.
dc.contributor.author Morozova, D. A.
dc.date.accessioned 2024-02-08T07:32:17Z
dc.date.available 2024-02-08T07:32:17Z
dc.date.issued 2024-01
dc.identifier.uri https://doi.org/10.1093/mnras/stad3583
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1435
dc.description.abstract We present the results of our study of cross-correlations between long-term multiband observations of the radio variability of the blazar 3C 279. More than a decade (2008–2022) of radio data were collected at seven different frequencies ranging from 2 to 230 GHz. The multiband radio light curves show variations in flux, with the prominent flare features appearing first at higher-frequency and later in lower-frequency bands. This behaviour is quantified by cross-correlation analysis, which finds that the emission at lower-frequency bands lags that at higher-frequency bands. Lag versus frequency plots are well fit by straight lines with negative slope, typically ∼−30 day GHz−1. We discuss these flux variations in conjunction with the evolution of bright moving knots seen in multiepoch Very Long Baseline Array maps to suggest possible physical changes in the jet that can explain the observational results. Some of the variations are consistent with the predictions of shock models, while others are better explained by a changing Doppler beaming factor as the knot trajectory bends slightly, given a small viewing angle to the jet. en_US
dc.language.iso en en_US
dc.publisher Monthly Notices of the Royal Astronomical Society en_US
dc.relation.ispartofseries 2069;mn527-6970
dc.subject radiation mechanisms: non-thermal en_US
dc.subject galaxies: active en_US
dc.subject galaxies: jets en_US
dc.subject quasars: individual: 3C 279 en_US
dc.title Multiband cross-correlated radio variability of the blazar 3C 279 en_US
dc.type Article en_US


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