Issue |
Astron. Astrophys. Suppl. Ser.
Volume 125, Number 3, November I 1997
|
|
---|---|---|
Page(s) | 573 - 580 | |
DOI | https://doi.org/10.1051/aas:1997244 | |
Published online | 15 November 1997 |
VLA polarimetry of compact steep spectrum sources
1
Istituto di Radioastronomia del CNR, Bologna, Italy
2
Institute for Astrophysics, University of New Mexico, Albuquerque NM, U.S.A.
3
Dipartimento di Fisica, Universitá degli Studi, Bologna, Italy
4
Tata Institute of Fundamental Research, National Centre for Radio Astrophysics, Pune 411 007, India
Send offprint request to: F. Mantovani
Received:
24
December
1996
Accepted:
12
February
1997
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 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.
Key words: galaxies: active / galaxies, quasars: radio polarization / interferometry
© European Southern Observatory (ESO), 1997