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How neutral is the intergalactic medium surrounding the redshift z=7.085 quasar ULAS J1120+0641?
James S. Bolton, Martin G. Haehnelt, Stephen J. Warren +5
The quasar ULAS J1120+0641 at redshift z=7.085 has a highly ionised near zone which is smaller than those around quasars of similar luminosity at z~6. The spectrum also exhibits ev…
AGN environments at z<1.5 in the UKIDSS Ultra-Deep Survey
E. J. Bradshaw, O. Almaini, W. G. Hartley +6
We investigate the environments of both X-ray and radio-loud AGN within the UKIDSS Ultra-deep Survey (UDS) using deep infrared selection to sample the galaxy density field in the r…
Probabilistic selection of high-redshift quasars
Daniel J. Mortlock, Mitesh Patel, Stephen J. Warren +4
High redshift quasars (HZQs) with redshifts of z >~ 6 are so rare that any photometrically-selected sample of sources with HZQ-like colours is likely to be dominated by Galactic st…
Galaxy Environments in the UKIDSS Ultra Deep Survey (UDS)
R. W. Chuter, O. Almaini, W. G. Hartley +7
We present a study of galaxy environments to z~2, based on a sample of over 33,000 K-band selected galaxies detected in the UKIDSS Ultra Deep Survey (UDS). The combination of infra…