Probing the center of activity in a CSS superluminal source 3C138

Z.-Q Shen,S Kameno,H.-B Cai,H Hirabayashi,D.-R Jiang,X Liu,X Chen,L.-L Shang,Y.-J Chen

doi:10.1109/aprasc.2004.1422495

Probing the center of activity in a CSS superluminal source 3C138

Z.-Q Shen, S Kameno + Show 7 more

https://doi.org/10.1109/aprasc.2004.1422495

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Publication Date: Aug 24, 2004

Affiliation: National Astronomical Observatory of Japan, Shanghai Astronomical Observatory, Institute of Space and Astronautical Science, Xinjiang Astronomical Observatory

#Compact Steep Spectrum #Very Long Baseline Interferometry + Show 8 more

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Abstract

We present the results from the first simultaneous multi-frequency (2.3, 5.0, 8.4 and 15 GHz) very long baseline interferometry (VLBI) observations of a compact steep spectrum (CSS) source 3C138, which is a powerful quasar. For the first time, the spectral distribution of the components within its central core region was obtained. This enables us to clearly identify the component at the western end as the location of the nuclear activity. The new measurements further clarify the superluminal motions of its inner jet components.

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