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Discovery of three z>6.5 quasars in the VISTA Kilo-degree Infrared Galaxy (VIKING) survey
B. P. Venemans, J. R. Findlay, W. J. Sutherland +6
Studying quasars at the highest redshifts can constrain models of galaxy and black hole formation, and it also probes the intergalactic medium in the early universe. Optical survey…
Black hole mass estimates and emission-line properties of a sample of redshift z>6.5 quasars
G. De Rosa, B. P. Venemans, R. Decarli +10
We present the analysis of optical and near-infrared spectra of the only four quasars known to date, discovered in the UKIDSS-LAS and VISTA-VIKING surveys. Our data-set con…
X-rays from the redshift 7.1 quasar ULAS J1120+0641
M. J. Page, C. Simpson, D. J. Mortlock +4
We present X-ray imaging and spectroscopy of the redshift z=7.084 radio-quiet quasar ULAS J112001.48+064124.3 obtained with Chandra and XMM-Newton. The quasar is detected as a poin…
Searching for large-scale structures around high-redshift radio galaxies with Herschel
E. E. Rigby, N. A. Hatch, H. J. A. Röttgering +15
This paper presents the first results of a far-infrared search for protocluster-associated galaxy overdensities using the SPIRE instrument on-board the {\it Herschel} Space Observa…
The galaxy environment of a QSO at z ~ 5.7
Eduardo Bañados, Bram Venemans, Fabian Walter +3
High-redshift quasars are believed to reside in massive halos in the early universe and should therefore be located in fields with overdensities of galaxies, which are thought to e…