MERLIN polarization observations of compact steep-spectrum sources at 5 GHz
We present polarization observations of 28 compact steep-spectrum sources made with the upgraded MERLIN at 5 GHz. With an angular resolution of 60 milliarcsec and rms noise levels of about 0.1 mJy beam−1, the total intensity images reveal new details in many of these sources. A few of the more exten...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 1998-09, Vol.299 (2), p.467-478 |
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| container_title | Monthly notices of the Royal Astronomical Society |
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| creator | Lüdke, E. Garrington, S. T. Spencer, R. E. Akujor, C. E. Muxlow, T. W. B. Sanghera, H. S. Fanti, C. |
| description | We present polarization observations of 28 compact steep-spectrum sources made with the upgraded MERLIN at 5 GHz. With an angular resolution of 60 milliarcsec and rms noise levels of about 0.1 mJy beam−1, the total intensity images reveal new details in many of these sources. A few of the more extended lobes and jets are quite highly polarized, but more than half of the components are completely unpolarized. Comparison with published data implies that this is due to Faraday depolarization, probably occurring in the surrounding medium with nB ∼ 1 cm−3μG. The high resolution of the present observations implies that the variations in Faraday rotation, probably due to magnetic field tangling, occur on scales of less than about 100 pc. |
| doi_str_mv | 10.1046/j.1365-8711.1998.01843.x |
| format | Article |
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Soc</addtitle><date>1998-09-11</date><risdate>1998</risdate><volume>299</volume><issue>2</issue><spage>467</spage><epage>478</epage><pages>467-478</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>We present polarization observations of 28 compact steep-spectrum sources made with the upgraded MERLIN at 5 GHz. With an angular resolution of 60 milliarcsec and rms noise levels of about 0.1 mJy beam−1, the total intensity images reveal new details in many of these sources. A few of the more extended lobes and jets are quite highly polarized, but more than half of the components are completely unpolarized. Comparison with published data implies that this is due to Faraday depolarization, probably occurring in the surrounding medium with nB ∼ 1 cm−3μG. 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| identifier | ISSN: 0035-8711 |
| ispartof | Monthly notices of the Royal Astronomical Society, 1998-09, Vol.299 (2), p.467-478 |
| issn | 0035-8711 1365-2966 |
| language | eng |
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| source | Oxford Journals Open Access Collection; Wiley Online Library Journals Frontfile Complete |
| subjects | galaxies: ISM galaxies: jets polarization radio continuum: galaxies techniques: miscellaneous |
| title | MERLIN polarization observations of compact steep-spectrum sources at 5 GHz |
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