VERY-LONG-BASE-LINE RADIO INTERFEROMETRY OBSERVATIONS OF LOW-POWER RADIO GALAXIES

The parsec scale properties of low power radio galaxies are reviewed h ere, using the available data on 12 Fanaroff-Riley type I galaxies. Th e most frequent radio structure is an asymmetric parsec-scale morpholo gy-i.e., core and one-sided jet. It is shared by 9 (possibly 10) of th e 12 mapped radio galaxies. One (possibly 2) of the other galaxies has a two-sided jet emission. Two sources are known from published data t o show a proper motion; we present here evidence for proper motion in two more galaxies, Therefore, in the present sample we have 4 radio ga laxies with a measured proper motion. One of these has a very symmetri c structure and therefore should be in the plane of the sky. The resul ts discussed here are in agreement with the predictions of the unified scheme models. Moreover, the present data indicate that the parsec sc ale structure in low and high power radio galaxies is essentially the same.