Aims: We report new VLBA polarimetric observations of the compact steep-spectrum (CSS) quasar 3C 147 (B0538+498) at 5 and 8.4 GHz.
Methods: By using multifrequency VLBA observations, we derived milliarcsecond-resolution images of the total intensity, polarisation, and rotation measure distributions, by combining our new observations with archival data.
Results: The source shows a one-sided structure, with a compact region, and a component extending about 200 mas to the south-west. The compact region is resolved into two main components with polarised emission, a complex rotation measure distribution, and a magnetic field dominated by components perpendicular to the source axis.
Conclusions: By considering all the available data, we examine the possible location of the core component, and discuss two possible interpretations of the observed structure of this source: core-jet and lobe-hot spot. Further observations to unambiguously determine the location of the core would help distinguish between the two possibilities discussed here.
Astronomy and Astrophysics
- Pub Date:
- September 2009
- galaxies: quasars: individual: 3C 147;
- galaxies: jets;
- radio continuum: galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- 11 pages, 12 figures