A&AS Supplement Series, Vol. 125, November I 1997
Received December 24, 1996; accepted February 12, 1997
F. Mantovani
, W. Junor
,
R. Fanti
, L. Padrielli, and D.J. Saikia
Send offprint request: F. Mantovani
Istituto di Radioastronomia del CNR, Bolog
na, Italy
Institute for Astrophysics, Universi
ty of New Mexico, Albuquerque NM, U.S.A.
Dipartimento di Fisica, Universit
25; degli Studi, Bologna, Italy
Tata Institute of Fundamental Resear
ch, National Centre for Radio
Astrophysics, Pune 411 007, India
We present the polarization properties at sub-arcsecond resolutions of 8 Compact Steep-spectrum Sources (CSSs) observed with the VLA A-array at 5, 8.4 and 15 GHz. We find that the three most compact sources, two of which are unresolved and have an angular diameter <100 milliarcsec are not polarized. Of the remaining 5, the two associated with quasars have prominent radio jets while the two galaxies and one unidentified object are dominated by their lobe emission. The components of these medium sized objects with median values of percentage polarization of about 9% at 5 GHz and 11% at 8.4 GHz, are more strongly polarized than the compact sources and do not show evidence of very large rotation measures.
keywords: galaxies: active -- galaxies, quasars: radio polarization -- interferometry