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- W4210366308 abstract "Abstract We explore the connection between the γ -ray and radio emission in the jet of the blazar 0716+714 by using 15, 37, and 230 GHz radio and 0.1–200 GeV γ -ray light curves spanning 10.5 yr (2008–2019). We find significant positive and negative correlations between radio and γ -ray fluxes in different time ranges. The time delays between radio and γ -ray emission suggest that the observed γ -ray flares originated from multiple regions upstream of the radio core, within a few parsecs from the central engine. Using time-resolved 43 GHz Very Long Baseline Array maps we identified 14 jet components moving downstream along the jet. Their apparent speeds range from 6 c to 26 c , and they show notable variations in their position angles upstream from the stationary component (∼0.53 mas from the core). The brightness temperature declines as a function of distance from the core according to a power law that becomes shallower at the location of the stationary component. We also find that the periods at which significant correlations between radio and γ -ray emission occur overlap with the times when the jet was oriented to the north. Our results indicate that the passage of a propagating disturbance (or shock) through the radio core and the orientation of the jet might be responsible for the observed correlation between the radio and γ -ray variability. We present a scenario that connects the positive correlation and the unusual anticorrelation by combining the production of a flare and a dip at γ -rays by a strong moving shock at different distances from the jet apex." @default.
- W4210366308 created "2022-02-08" @default.
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- W4210366308 date "2022-01-01" @default.
- W4210366308 modified "2023-09-26" @default.
- W4210366308 title "Radio and γ-Ray Activity in the Jet of the Blazar S5 0716+714" @default.
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