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A&AS Supplement Series, Vol. 125, November I 1997

Received December 24, 1996; accepted February 12, 1997

VLA polarimetry of compact steep spectrum sources

F. Mantovanitex2html_wrap1443, W. Junortex2html_wrap1445, R. Fantitex2html_wrap1447, L. Padriellitex2html_wrap1443, and D.J. Saikiatex2html_wrap1451

Send offprint request: F. Mantovani
tex2html_wrap523 Istituto di Radioastronomia del CNR, Bolog na, Italy
tex2html_wrap523  Institute for Astrophysics, Universi ty of New Mexico, Albuquerque NM, U.S.A.
tex2html_wrap525  Dipartimento di Fisica, Universit 25; degli Studi, Bologna, Italy
tex2html_wrap527  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

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