VLBI Observations of Low Power Radio Galaxies

Details VLBI Observations of Low Power Radio Galaxies VLBI Observations of Low Power Radio Galaxies

1995-06-06

arxiv.org/abs/astro-ph/9506034v1

Astronomy and Astrophysics

Astrophysics

9 pages, TEX, figures available only by FAX, e-mail address GGIOVANNINI@ASTBO1.BO.CNR.IT Invited paper at the National Academy

Scientific paper

The parsec scale properties of low power radio galaxies are reviewed here, using the available data on 12 FR I galaxies. The most frequent radio structure is an asymmetric parsec-scale morphology, i.e. core and one-sided jet. It is shared by 9 (possibly 10) of the 12 mapped radio galaxies. One (possibly 2) of the other galaxies has (have) a two-sided jet emission. Two sources are known from published data to show a proper motion; we present here evidence for proper motion in two more galaxies. Therefore, in the present sample we have 4 radio galaxies with a measured proper motion. One of these has a very symmetric structure and therefore should be in the plane of the sky. The results discussed here are in agreement with the predictions of the unified scheme models. Moreover, the present data indicate that the parsec scale structure in low and high power radio galaxies is essentially the same.

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