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Radio-quiet quasar environments at 0.5<=z<=0.8

Wold, Margrethe; Lacy, Mark; Lilje, Per B. and Serjeant, Stephen (2001). Radio-quiet quasar environments at 0.5<=z<=0.8. Monthly Notices of the Royal Astronomical Society, 323(1) pp. 231–247.

URL: http://arxiv.org/abs/astro-ph/0011394
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1046/j.1365-8711.2001.04229.x
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Abstract

We quantify the galaxy environments around a sample of 0.5<=z<=0.8 radio-quiet quasars using the amplitude of the spatial galaxy-quasar correlation function, Bgq. The quasars exist in a wide variety of environments; some sources are located in clusters as rich as Abell class 1-2 clusters, whereas others exist in environments comparable to the field. We find that, on average, the quasars prefer poorer clusters of ~Abell class 0, which suggests that quasars are biased tracers of mass compared with galaxies. The mean Bgq for the sample is found to be indistinguishable from the mean amplitude for a sample of radio-loud quasars matched in redshift and optical luminosity. These observations are consistent with recent studies of the hosts of radio-quiet quasars at low to intermediate redshifts, and suggest that the mechanism for the production of powerful radio jets in radio-loud quasars is controlled by processes deep within the active galactic nucleus itself, and is unrelated to the nature of the hosts or their environments.

Item Type: Journal Article
ISSN: 1365-2966
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: galaxies; clusters;
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 5819
Depositing User: Users 13 not found.
Date Deposited: 07 Nov 2006
Last Modified: 11 Jul 2013 15:25
URI: http://oro.open.ac.uk/id/eprint/5819
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