Bram Venemans

TL;DR: Observations of a quasar at a redshift of 7.3 are reported, suggesting that the neutral fraction of the intergalactic medium in front of ULAS J1120+0641 exceeded 0.1.

TL;DR: Strong evidence of absorption of the spectrum of the quasar redwards of the Lyman α emission line (the Gunn–Peterson damping wing), as would be expected if a significant amount of the hydrogen in the intergalactic medium surrounding J1342 + 0928 is neutral, and a significant fraction of neutral hydrogen is derived, although the exact fraction depends on the modelling.

TL;DR: In this article, the authors presented the results of a large program conducted with the Very Large Telescope and augmented by observations with the Keck telescope to search for forming clusters of galaxies near powerful radio galaxies at 2.5 and 3.0 GHz.

TL;DR: In this article, the authors report the discovery of an extremely long (∼110 Mpc/h) and dark (τeff≳7) Lyα trough extending down to z≃5.5 towards the zem≃6.0 quasar ULAS J0148+0600.

TL;DR: In this article, the authors reported the discovery of three new z = 6.4 quasars in 332 deg$^{2}$ of the VISible and Infrared Survey Telescope for Astronomy Kilo-degree Infrared Galaxy (VIKING) survey, thus extending the number from 1 to 4.