Geraint Harker

TL;DR: In this article, the authors present simulated astrophysical foregrounds data cubes and discuss their possible statistical effects on the data, and show that with the expected LOFAR-EoR sky and receiver noise levels, which amount to approximate to 52 mK at 150 MHz after 400 h of total observing time, a simple polynomial fit allows a statistical reconstruction of the signal.

TL;DR: In this paper, the authors present the first limits on the Epoch of Reionization 21 cm H I power spectra, in the redshift range z = 7.9 −10.6, using the Low-Frequency Array (LOFAR) High-Band Antenna (HBA).

TL;DR: In this article, the authors studied the environmental dependence of the formation epoch of dark matter haloes in the Millennium Simulation, a ten billion particle N-body simulation of standard Lambda cold dark matter cosmology.

TL;DR: In this paper, the authors present simulated astrophysical foregrounds datacubes and discuss their possible statistical effects on the data and show that with the expected LOFAR-EoR sky and receiver noise levels, which amount to ~52 mK at 150 MHz after 300 hours of total observing time, a simple polynomial fit allows a statistical reconstruction of the signal.

TL;DR: In this article, a series of observations were conducted with the Westerbork telescope in the 140-160 MHz range with a 2 arcmin resolution aimed at characterizing the properties of the foregrounds for epoch of reionization experiments.