The redshifted 21 cm line is an emerging tool in cosmology, in principle permitting three-
dimensional surveys of our universe that reach unprecedentedly large volumes, previously …

We report the most sensitive upper limits to date on the 21 cm epoch of reionization power
spectrum using 94 nights of observing with Phase I of the Hydrogen Epoch of Reionization …

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 …

Early observations with JWST indicate an overabundance of bright galaxies at redshifts z≳
10 relative to Hubble-calibrated model predictions. More puzzling still is the apparent lack of …

Recent observations with JWST have identified several bright galaxy candidates at z≳ 10,
some of which appear unusually massive (up to∼ 10 11 M⊙). Such early formation of …

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 …

The universe goes through several phase transitions during its formative stages. Cosmic
reionisation is the last of them, where ultraviolet and X-ray radiation escape from the first …

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 …

Observations of the redshifted 21-cm line of atomic hydrogen have provided several upper
limits on the 21-cm power spectrum and a tentative detection of the sky-averaged signal at …

Using the global 21-cm signal measurement by the EDGES collaboration, we derive
constraints on the fraction of the dark matter that is in the form of primordial black holes …