Other
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..446f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 446-451.
Other
30
Galactic Structure, Radio Galaxies, Very Large Array (Vla), Very Long Base Interferometry, Doppler Effect, Emission Spectra, Plasma Jets
Scientific paper
We present VLBI and VLA observations of the Fanaroff-Riley 'type I' radio galaxy 3C 338. On both milliarcsec and arcsecond scales, the source is characterized by emission on both sides of the core. In the VLBI images, the symmetric structures have three or four 'knots' in the emission on each side of the core. The reliability of the VLBI images was extensively tested using two different data reduction procedures. Detection of equally bright emission on both sides of a parcsec-scale core implies that Doppler boosting is small: either the source orientation is near the plane of the sky, or the twin jets are not highly relativistic. Another possibility is that the jet is intrinsically one-sided and alternately feeds energy into opposite directions.
Comoretto Gianni
Feretti Luigina
Giovannini Gabriele
Venturi Tiziana
Wehrle Ann E.
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