Modeling cosmic reionization

NY Gnedin, P Madau - Living Reviews in Computational Astrophysics, 2022 - Springer
The transformation of cold neutral intergalactic hydrogen into a highly ionized warm plasma
marks the end of the cosmic dark ages and the beginning of the age of galaxies. The details …

Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR

FG Mertens, M Mevius, LVE Koopmans… - Monthly Notices of …, 2020 - academic.oup.com
ABSTRACT A new upper limit on the 21 cm signal power spectrum at a redshift of z≈ 9.1 is
presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The …

HERA phase I limits on the cosmic 21 cm signal: constraints on astrophysics and cosmology during the epoch of reionization

Z Abdurashidova, JE Aguirre, P Alexander… - The Astrophysical …, 2022 - iopscience.iop.org
Abstract Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the
experiment's first upper limits on the power spectrum of 21 cm fluctuations at z∼ 8 and 10 …

Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal

J Park, A Mesinger, B Greig… - Monthly Notices of the …, 2019 - academic.oup.com
The properties of the first galaxies, expected to drive the Cosmic Dawn and the Epoch of
Reionization, are encoded in the 3D structure of the cosmic 21-cm signal. Parameter …

Studying cosmic dawn using redshifted HI 21-cm signal: A brief review

A Bera, R Ghara, A Chatterjee, KK Datta… - Journal of Astrophysics …, 2023 - Springer
In this review article, we briefly outline our current understanding of the physics associated
with the HI 21-cm signal from cosmic dawn. We discuss different phases of cosmic dawn as …

Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations

R Ghara, SK Giri, G Mellema, B Ciardi… - Monthly Notices of …, 2020 - academic.oup.com
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM)
at redshift≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the …

An effective model for the cosmic-dawn 21-cm signal

JB Muñoz - Monthly Notices of the Royal Astronomical Society, 2023 - academic.oup.com
The 21-cm signal holds the key to understanding the first structure formation during cosmic
dawn. Theoretical progress over the last decade has focused on simulations of this signal …

Constraining the state of the intergalactic medium during the Epoch of Reionization using MWA 21-cm signal observations

R Ghara, SK Giri, B Ciardi, G Mellema… - Monthly Notices of the …, 2021 - academic.oup.com
ABSTRACT The Murchison Widefield Array (MWA) team has derived new upper limits on the
spherically averaged power spectrum of the 21-cm signal at six redshifts in the range z≈ 6.5 …

Emulating simulations of cosmic dawn for 21 cm power spectrum constraints on cosmology, reionization, and x-ray heating

NS Kern, A Liu, AR Parsons, A Mesinger… - The Astrophysical …, 2017 - iopscience.iop.org
Current and upcoming radio interferometric experiments are aiming to make a statistical
characterization of the high-redshift 21 cm fluctuation signal spanning the hydrogen …

Constraining the X-ray heating and reionization using 21-cm power spectra with Marginal Neural Ratio Estimation

A Saxena, A Cole, S Gazagnes… - Monthly Notices of …, 2023 - academic.oup.com
ABSTRACT Cosmic Dawn (CD) and Epoch of Reionization (EoR) are epochs of the
Universe which host invaluable information about the cosmology and astrophysics of X-ray …