MERLIN polarization observations of compact steep-spectrum sources at 5 GHz

Lüdke, Everton; Garrington, S. T.; Spencer, R. E.; Akujor, C. E.; Muxlow, T. W. B.; Sanghera, H. S.; Fanti, C.

doi:10.1046/j.1365-8711.1998.01843.x

Cited by 55 publications

(99 citation statements)

References 9 publications

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“…Both lobes are polarised at X-and U-band, showing strong depolarisation between 15 and 8.0 GHz. The lobes are completely depolarised by 5 GHz as reported by Lüdke et al (1998). The eastern and western lobes have RMs of 942 and 615 rad m −2…”

Section: −080 -supporting

confidence: 68%

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Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution

Mantovani

Rossetti

Junor

et al. 2013

A&A

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Aims. We report new Very Large Array (VLA) polarimetric observations of compact steep-spectrum (CSS) sources at 8.4, 15, and 23 GHz. Methods. Using multi-frequency VLA observations we have derived sub-arcsecond resolution images of the total intensity, polarisation, and rotation measure (RM) distributions.Results. We present multi-frequency VLA polarisation observations of CSS sources. About half of the sources are point-like even at the resolution of ∼0.1 × 0.1 arcsec. The remaining sources have double or triple structure. Low values for the percentage of polarised emission in CSS sources is confirmed. On the average, quasars are more polarised than galaxies. A wide range of RM values have been measured. There are clear indications of very large RMs up to ≈5585 rad m −2 . CSS galaxies are characterized by RM values that are larger than CSS quasars. The majority of the objects show very large values of RM. Conclusions. The available data on sub-arcsecond-scale rest-frame RM estimates for CSS sources show that these have a wide range of values extending up to ∼36 000 rad m −2 . RM estimates indicate an overall density of the magneto-ionic medium larger than classical radio sources.

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Section: −080 -supporting

confidence: 68%

“…Components a and b show RM rf = −883 and −310 rad m −2 , respectively. However, we obtained a much better fit to the λ 2 law for component b (RM rf = −1042 rad m −2 ) if the χ value at 5.0 GHz of Lüdke et al (1998) is discarded.…”

Section: −197 -mentioning

confidence: 94%

Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution

Mantovani

Rossetti

Junor

et al. 2013

A&A

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“…Regions of high rotation measure have also been reported near the bends or other jet-ISM interactions in a number of CSS jets, for example 3C 119 (Flatters 1998;Nan et al 1999), 3C 216 (Lüdke et al 1998;Taylor et al 1998), and B0548+165 (Mantovani et al 2002). Figure 5, right), is more strongly polarised but has relatively large rotation measures from the core (top) until the jet reaches the southern knot where the jet is deflected to the west.…”

Section: Observations: Css Sourcesmentioning

confidence: 75%

Polarimetry of GPS and CSS Sources

Cotton

Dallacasa

Fanti

et al. 2003

Publ. – Astron. Soc. Aust

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Abstract: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.

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“…At sub-arcsecond resolution, the radio source has a triple structure with an L-shaped central component. At milliarcsecond resolution, this central component reveals a very asymmetric, bent core-jet morphology Lüdke et al 1998). A jet-cloud interaction has been suggested (Akujor, Spencer, & Saikia 1991) as explanation for the sharp bend seen in the jet.…”

Section: The Css Quasar 3c 43mentioning

confidence: 82%

The Polarised Bent Jet of 3C 43

Mantovani¹,

Junor²,

Saikia³

et al. 2003

Publ. – Astron. Soc. Aust

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Radio observations of linear polarisation provide a useful probe of the physical conditions in the gaseous environments of compact steep spectrum (CSS) sources. Here, we present polarimetric VLBA observations at 8.4 GHz of the CSS quasar 3C 43. The jet in this source curves gently up to about 220 mas from the core, at which point it bends sharply, probably due to a jet-cloud encounter. Regions of polarised emission are detected along the jet, while the core component shows no significant polarisation.

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MERLIN polarization observations of compact steep-spectrum sources at 5 GHz

Cited by 55 publications

References 9 publications

Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution

Radio polarimetry of compact steep spectrum sources at sub-arcsecond resolution

Polarimetry of GPS and CSS Sources

The Polarised Bent Jet of 3C 43

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