Volume 448, Number 2, March III 2006
|Page(s)||535 - 545|
|Published online||24 February 2006|
Probing the ionized ISM of the CSS quasar 3C 277.1
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA e-mail: email@example.com
2 Istituto di Radioastronomia – INAF, via P. Gobetti 101, 40129 Bologna, Italy
3 Dipartimento di Fisica, Universitá di Bologna, via Irnerio 46, 40126 Bologna, Italy
4 Australian National University, Mt. Stromlo Observatory, Cotter Rd., Weston, ACT 2611, Australia
5 NRAL-Jodrell Bank, University of Manchester, Macclesfield Cheshire, SK11 9DL, UK
Accepted: 3 November 2005
We present new multi-wavelength high resolution VLA polarimetric images of the CSS quasar 3C 277.1 and analyze them with older Merlin and HST [OIII] images. These observations were made to test the hypothesis that the [OIII] emission as well as the long wavelength radio opacity arise in shocks that the quasar jet induces in the ISM. The multi-wavelength radio polarimetric images allow the study of the intervening magnetized plasma using Faraday effects. The HST [OIII] image potentially reveals regions of shock that have cooled sufficiently to radiate. We find no compelling evidence that the jet is directly responsible for the majority of the [OIII] emission or that there is significant dense shocked material in the immediate vicinity of most of the jet. There is evidence for jet-induced shocks on the northern edge of the eastern lobe. We find a spectral age of the radio source of ∼ yr giving advance speeds of the lobes of 0.15 c and 0.06 c for the western and eastern lobes. The strong Faraday effects appear to be confined within the inner 3 kpc as does the [OIII] emission.
Key words: polarization / galaxies: quasars: individual: 3C 277.1 / galaxies: jets / galaxies: nuclei / radio continuum: galaxies
© ESO, 2006
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