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Selection constraints on high redshift quasar searches in the VISTA kilo-degree infrared galaxy survey
J. R. Findlay, W. J. Sutherland, B. P. Venemans +5
The European Southern Observatory's (ESO) Visible and Infrared Survey Telescope for Astronomy (VISTA) is a 4-m class survey telescope for wide-field near-infrared imaging. VISTA is…
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…
A luminous quasar at a redshift of z = 7.085
Daniel J. Mortlock, Stephen J. Warren, Bram P. Venemans +14
The intergalactic medium was not completely reionized until approximately a billion years after the Big Bang, as revealed by observations of quasars with redshifts of less than 6.5…
Discovery of a high-z protocluster with tunable filters: the case of 6C0140+326 at z=4.4
E. Kuiper, N. A. Hatch, B. P. Venemans +7
We present the first results obtained using a tunable narrowband filter in the search for high-z protoclusters. Using the recently commissioned red tunable filter on the Gran Teles…
Evolution of the observed Ly-alpha luminosity function from z = 6.5 to z = 7.7: evidence for the epoch of reionization ?
B. Clément, J. -G. Cuby, F. Courbin +17
Aims. Ly-alpha emitters (LAEs) can be detected out to very high redshifts during the epoch of reionization. The evolution of the LAE luminosity function with redshift is a direct p…
A SINFONI view of flies in the Spiderweb: a galaxy cluster in the making
E. Kuiper, N. A. Hatch, G. K. Miley +8
The environment of the high-z radio galaxy PKS 1138-262 at z~2.2 is a prime example of a forming galaxy cluster. We use deep SINFONI data to perform a detailed study of the kinemat…