Using the sample variance of 21cm maps as a tracer of the ionisation topology

no code implementations • 8 Feb 2021 • Adélie Gorce, Anne Hutter, Jonathan R. Pritchard

Intensity mapping of the 21cm signal of neutral hydrogen will yield exciting insights into the Epoch of Reionisation and the nature of the first galaxies.

Cosmology and Nongalactic Astrophysics

Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn

no code implementations • 21 Dec 2020 • Mohd Kamran, Raghunath Ghara, Suman Majumdar, Rajesh Mondal, Garrelt Mellema, Somnath Bharadwaj, Jonathan R. Pritchard, Ilian T. Iliev

We find that $T_{\rm S}$ fluctuations have maximum impact on the bispectra magnitude for small $k$-triangles and at the stage when Ly$\alpha$ coupling reaches saturation.

Cosmology and Nongalactic Astrophysics

Studying the morphology of reionisation with the triangle correlation function of phases

1 code implementation • 27 Mar 2019 • Adélie Gorce, Jonathan R. Pritchard

It is derived from the three-point correlation function and aims to probe the characteristic scale of ionized regions during the epoch of reionization from 21cm interferometric observations.

Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics

Evolution of the 21 cm signal throughout cosmic history

no code implementations • 15 Feb 2008 • Jonathan R. Pritchard, Abraham Loeb

The potential use of the redshifted 21 cm line from neutral hydrogen for probing the epoch of reionization is motivating the construction of several low-frequency interferometers.