VLBI OBSERVATIONS OF A COMPLETE SAMPLE OF RADIO GALAXIES V. 3C 346 AND 4C 31.04: TWO UNUSUAL COMPACT STEEP SPECTRUM SOURCES

摘要

We present observations at 1.7 and 8.4 GHz of two compact steep spectrum (CSS) sources from a complete sample of low-intermediate-power radio galaxies. The galaxy 3C 346 shows an asymmetric structure with a one-sided "jet" and " hot spot." Present observations suggest that the classification of this source as a CSS is inappropriate and that it is a common radio galaxy at a small angle to the line of sight. Its properties are in agreement with the predictions of unified scheme models. The galaxy 4C 31.04 shows more complex structure, with the possibility of a centrally located flat spectum core in between two close lobes. We suggest that this source could be a low-redshift compact symmetric object.