Polarimetry of GPS and CSS sources

被引：33

作者：

Cotton, WD

Dallacasa, D

Fanti, C

Fanti, R

Foley, AR

Schilizzi, RT

Spencer, R

Saikia, DJ

Garrington, S

机构：

[1] Natl Radio Astron Observ, Charlottesville, VA 22903 USA

[2] CNR, Ist Radioastron, I-40129 Bologna, Italy

[3] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy

[4] Netherlands Fdn Res Astron, NL-7990 AA Dwingeloo, Netherlands

[5] Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands

[6] Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands

[7] Nuffield Radio Astron Observ Labs, Jodrell Bank SK11 9D1, Cheshire, England

[8] Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA | 2003年 / 20卷 / 01期

关键词：

polarisation; galaxies : active; galaxies : ISM; galaxies : jets; radio continuum : galaxies; radio continuum : ISM;

D O I：

10.1071/AS02031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The role of radio polarimetry in the understanding of GPS and CSS sources is explored. After an initial discussion of what can be learned from polarimetry, the expectations of a simple evolutionary sequence of GPS/CSO to CSS to FR I/FR II sources are explored. Observational results are then compared with the expectations. Conclusions include: the GPS category is likely not a single homogeneous class of objects; Faraday depth effects are very strong inside the inner 3 kpc of CSS and CSO sources; in at least 3C 138 the Faraday screen has very fine scale (subparsec) structure; and there is evidence for increased ionisation near bends in some CSS jets probably due to jet-ISM interaction. New results on 3C 138, 3C 43, and 3C 454 are given.

引用

页码：12 / 15

页数：4

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