14 papers
Predicted number counts and clustering of Hi galaxies from future radio surveys
Ainulnabilah Nasirudin, Philip Bull, Isabelle Ye
The 21cm emission line from neutral hydrogen (HI) contained within galaxies provides a way to make accurate spectroscopic redshift determinations at radio frequencies. Large arrays…
Bayesian component separation and power spectrum estimation for 21 cm intensity mapping data cubes
Geoff G. Murphy, Philip Bull, Mario G. Santos +2
Foreground removal remains an ongoing challenge in radio cosmology, and increasingly sensitive experiments necessitate more robust analysis techniques. In this work, we model simul…
Bayesian power spectrum estimation with modelling of systematic effects in delay-fringe rate space
Sohini Dutta, Philip Bull, Jacob Burba +3
Observing the Epoch of Reionisation using 21cm radio interferometry has proven to be a challenging task. Extraction of the extremely faint redshifted signal is complicated by the p…
Disentangling the anisotropic radio sky: Fisher forecasts for 21cm arrays
Zheng Zhang, Philip Bull, Katrine A. Glasscock
The existence of a radio synchrotron background (RSB) excess is implied by a number of measurements, including excess emission seen by the ARCADE~2 and LWA experiments. Highly sens…
RHINO: A large horn antenna for detecting the 21cm global signal
Philip Bull, Ahmed El-Makadema, Hugh Garsden +11
The sky-averaged brightness temperature of the 21cm line from neutral hydrogen provides a sensitive probe of the thermal state of the intergalactic medium, particularly before and…
First Results from HERA Phase II
The HERA Collaboration, Zuhra Abdurashidova, Tyrone Adams +83
We report the first upper limits on the power spectrum of 21-cm fluctuations during the Epoch of Reionization and Cosmic Dawn from Phase II of the Hydrogen Epoch of Reionization Ar…