K-band polarimetry of seven high-redshift radio galaxies

Leyshon, G. and Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X 1998. K-band polarimetry of seven high-redshift radio galaxies. Monthly Notices of the Royal Astronomical Society 295 (1) , pp. 10-18. 10.1046/j.1365-8711.1998.29511145.x

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Abstract

We present the results of K-band imaging polarimetry of seven 3CR radio galaxies with 0.7 < z < 1.2. We find strong evidence for polarization in three sources: 3C 22, 3C 41 and 3C 114. Of these, 3C 41 shows strong evidence of having a quasar core the infrared light of which is scattered by dust. We also find some evidence for polarization in 3C 54 and in 3C 356. The two point-like sources (3C 22 and 3C 41) and the barely-elongated 3C 54 appear to have of order 10 per cent of their K-band flux contributed by scattered light from the active nucleus. We conclude that scattered nuclear light can form a significant component of the near-infrared light emitted by high-redshift radio galaxies, and discuss models in which the scattering particles are electrons and dust grains.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	polarization; galaxies: active; infrared: galaxies
Publisher:	Oxford University Press
ISSN:	0035-8711
Last Modified:	24 Oct 2022 11:13
URI:	https://orca.cardiff.ac.uk/id/eprint/47326

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