Issue |
A&A
Volume 448, Number 2, March III 2006
|
|
---|---|---|
Page(s) | 535 - 545 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361:20054338 | |
Published online | 24 February 2006 |
Probing the ionized ISM of the CSS quasar 3C 277.1
I. Observations
1
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA e-mail: bcotton@nrao.edu
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
Received:
11
October
2005
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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