324 citations · 5k across the 89 of their papers we have counts for
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Receiver design for the REACH global 21-cm signal experiment
Ian L. V. Roque, Nima Razavi-Ghods, Steven H. Carey +35
We detail the the REACH radiometric system designed to enable measurements of the 21-cm neutral hydrogen line. Included is the radiometer architecture and end-to-end system simulat…
Antenna beam characterisation for the global 21cm experiment LEDA and its impact on signal model parameter reconstruction
M. Spinelli, G. Kyriakou, G. Bernardi +4
Cosmic Dawn, the onset of star formation in the early universe, can in principle be studied via the 21cm transition of neutral hydrogen, for which a sky-averaged absorption signal,…
Marginal Post Processing of Bayesian Inference Products with Normalizing Flows and Kernel Density Estimators
Harry T. J. Bevins, William J. Handley, Pablo Lemos +4
Bayesian analysis has become an indispensable tool across many different cosmological fields including the study of gravitational waves, the Cosmic Microwave Background and the 21-…
Bayesian Data Analysis for Sky-averaged 21-cm Experiments in the Presence of Ionospheric Effects
Emma Shen, Dominic Anstey, Eloy de Lera Acedo +1
The ionosphere introduces chromatic distortions on low frequency radio waves, and thus poses a hurdle for 21-cm cosmology. In this paper we introduce time-varying chromatic ionosph…
Radio antenna design for sky-averaged 21 cm cosmology experiments: the REACH case
J. Cumner, E. De Lera Acedo, D. I. L. de Villiers +35
Following the reported detection of an absorption profile associated with the 21~cm sky-averaged signal from the Cosmic Dawn by the EDGES experiment in 2018, a number of experiment…
Quantifying Ionospheric Effects on Global 21-cm Observations
Emma Shen, Dominic Anstey, Eloy de Lera Acedo +2
We modelled the two major layer of Earth's ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the chromatic ionospheric effects…
Peering into the Dark (Ages) with Low-Frequency Space Interferometers
Leon Koopmans, Rennan Barkana, Mark Bentum +28
Neutral hydrogen pervades the infant Universe, and its redshifted 21-cm signal allows one to chart the Universe. This signal allows one to probe astrophysical processes such as the…
Discovering the Sky at the Longest Wavelengths with Small Satellite Constellations
Xuelei Chen, Jack Burns, Leon Koopmans +29
Due to ionosphere absorption and the interference by natural and artificial radio emissions, ground observation of the sky at the decameter or longer is very difficult. This unexpl…
Design and characterization of the Large-Aperture Experiment to Detect the Dark Age (LEDA) radiometer systems
D. C. Price, L. J. Greenhill, A. Fialkov +24
The Large-Aperture Experiment to Detect the Dark Age (LEDA) was designed to detect the predicted O(100)mK sky-averaged absorption of the Cosmic Microwave Background by Hydrogen in…
A Space-Based Observational Strategy for Characterizing the First Stars and Galaxies Using the Redshifted 21-cm Global Spectrum
Jack O. Burns, Richard Bradley, Keith Tauscher +19
The redshifted 21-cm monopole is expected to be a powerful probe of the epoch of the first stars and galaxies (). The global 21-cm signal is sensitive to the thermal and i…