Gamma-ray-emitting quasar 0202$+$149: a CSS revisited
T. An, Y.-Z. Cui, W.A. Baan, W.-H. Wang, P. Mohan

TL;DR
This paper investigates the properties of the gamma-ray-emitting quasar PKS 0202+149, revealing its classification as a compact steep spectrum source with a re-started nuclear activity and relativistic jet, linking CSS sources to blazar-like gamma-ray behavior.
Contribution
It demonstrates that low-power CSS radio sources can exhibit blazar-like gamma-ray properties, expanding the understanding of AGN classifications and jet activity.
Findings
PKS 0202+149 shows a triple radio structure with a size of ~1.3 kpc.
A relativistic jet with superluminal motion of ~16c is observed.
The source exhibits signs of recent re-started nuclear activity.
Abstract
PKS 0202149 is a low-power radio source with blazar-like -ray AGN characteristics and its properties and classification are investigated in relation to its -ray characteristics. It shows a hint of low frequency turnover at about 200 MHz. Radio imaging data of 0202149 at different frequencies show differing morphologies on both kilo-parsec (kpc) and parsec (pc) scales. The overall source shows a triple structure of core and double lobes with a total projected size of 1.3 kpc. The compact source structure of 0202+149 is reminiscent of a compact steep spectrum (CSS) source. At pc scales a core-jet structure extends 25 pc (in projection) at a position angle perpendicular to the kpc-scale structure. The curved pc-scale structure with jet and inner lobe suggests that the CSS nuclear activity has recently re-started although its power has been decreasing,…
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