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Showing 1–6 of 6 results

Advanced filters: Author: E. de Lera Acedo Clear advanced filters

From a small antenna to cosmic dawn

Conflicting results in measurements of the global spectrum of the hydrogen 21-cm line may indicate that there are large systematic errors. A different experimental approach to reach the redshifted signal from cosmic dawn assesses possible systematic errors together with the signal.

Xuelei Chen
News & Views21 Jul 2022
Nature Astronomy

Volume: 6, P: 887-888
Radiometer calibration using machine learning

S. A. K. Leeney
H. T. J. Bevins
M. Spinelli
ResearchOpen Access02 Oct 2025
Scientific Reports

Volume: 15, P: 1-15
Determination of the mass distribution of the first stars from the 21-cm signal

Next-generation radio telescopes, such as the Square Kilometre Array, will be able to reveal the mass distribution of the first stars in the Universe by detecting their impact on a faint radio signal of hydrogen atoms from Cosmic Dawn.

T. Gessey-Jones
N. S. Sartorio
R. Barkana
ResearchOpen Access20 Jun 2025
Nature Astronomy

Volume: 9, P: 1268-1279
The REACH radiometer for detecting the 21-cm hydrogen signal from redshift z ≈ 7.5–28

The Radio Experiment for the Analysis of Cosmic Hydrogen (REACH) aims to detect the sky-averaged 21-cm neutral hydrogen line from the early Universe by jointly analysing the cosmological signal, foreground emission and systematic effects.

E. de Lera Acedo
D. I. L. de Villiers
K. Zarb-Adami
Research21 Jul 2022
Nature Astronomy

Volume: 6, P: 984-998
Author Correction: The REACH radiometer for detecting the 21-cm hydrogen signal from redshift z ≈ 7.5–28

E. de Lera Acedo
D. I. L. de Villiers
K. Zarb-Adami
Amendments and Corrections03 Oct 2022
Nature Astronomy

Volume: 6, P: 1332
Astrophysical constraints from the SARAS 3 non-detection of the cosmic dawn sky-averaged 21-cm signal

An analysis of several models provides astrophysical constraints on the Universe at redshift ~20, corresponding to ~200 million years after the Big Bang, using upper limits on the sky-averaged 21-cm signal measured by the SARAS 3 radiometer.

H. T. J. Bevins
A. Fialkov
R. Barkana
Research28 Nov 2022
Nature Astronomy

Volume: 6, P: 1473-1483