Astron. Astrophys. Suppl. Ser. 134, 309-316

A VLBI study of GHz-Peaked-Spectrum radio sources

II. Additional VLBI images at 6 cm

C. Stanghellini^1,4 - C.P. O'Dea² - D.W. Murphy³

Send offprint request: C. Stanghellini

1 - Istituto di Radioastronomia del CNR, C.P. 141, I-96017 Noto SR, Italy
2 - Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, U.S.A.
3 - Jet Propulsion Laboratory, MS 238-600, 4800 Oak Grove Drive, Pasadena, CA 91109, U.S.A.
4 - Visitor at the Space Telescope Science Institute, Baltimore

Received July 15; accepted August 21, 1998

Abstract:

We present VLBI observations at 5 GHz of 11 GHz Peaked Spectrum (GPS) or candidate GPS sources. Two of them belong to the complete sample defined by Stanghellini et al. (1998) (the GPS 1 Jy sample), while the others are selected from a heterogeneous list compiled by O'Dea et al. (1991). Morphologies of the sources presented here are similar to those found in Stanghellini et al. (1997) and in the small Compact Steep Spectrum (CSS) sources studied by Dallacasa et al. (1995).

Our results strengthen the evidence that GPS quasars tend to have core-jet or complex morphology and GPS galaxies tend to be compact symmetric objects (CSO).

Key words: galaxies: active -- quasars: general -- radio continuum: galaxies