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 …

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 …

The ARCADE2 and LWA1 experiments have claimed an excess over the cosmic microwave
background (CMB) at low radio frequencies. If the cosmological high-redshift contribution to …

Radio sources are expected to have formed at high redshifts, producing an excess radiation
background above the cosmic microwave background (CMB) at low frequencies. Their effect …

Modeling the 21-cm global signal from the Cosmic Dawn is challenging due to the many
poorly constrained physical processes that come into play. We address this problem using …

The global 21-cm signal from the cosmic dawn is affected by a variety of heating and cooling
processes. We investigate the impact of heating due to Ly α photons on the global 21-cm …

We explore the possibility of constraining model parameters of the Epoch of Reionization
(EoR) from 21cm brightness temperature maps, using a combination of morphological …

ABSTRACT We present a Markov Chain Monte Carlo (MCMC)-based parameter estimation
package, CosmoReionMC, to jointly constrain cosmological parameters of the Lambda cold …

We present a study of the 21-cm signal bispectrum (which quantifies the non-Gaussianity in
the signal) from the Cosmic Dawn (CD). For our analysis, we have simulated the 21-cm …

We study the upper projected bounds on the dark matter fraction in the form of the primordial
black holes (PBHs) with a non-zero spin by using the absorption feature in the global 21-cm …