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 …

Due to ionosphere absorption and the interference of natural and artificial radio emissions,
astronomical observation from the ground becomes very difficult at the wavelengths of …

Measurements of 21 cm Epoch of Reionization (EoR) structure are subject to systematics
originating from both the analysis and the observation conditions. Using 2013 data from the …

The all-sky 408 MHz map of Haslam et al. is one the most important total-power radio
surveys. It has been widely used to study diffuse synchrotron radiation from our Galaxy and …

We present new constraints on the 21 cm Epoch of Reionization (EoR) power spectrum
derived from three months of observing with a 32 antenna, dual-polarization deployment of …

The 21 cm line provides a powerful probe of astrophysics and cosmology at high redshifts,
but unlocking the potential of this probe requires the robust mitigation of foreground …

We present a detection of 21 cm emission from large-scale structure (LSS) between redshift
0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment. Radio …

HI intensity mapping (IM) is a novel technique capable of mapping the large-scale structure
of the Universe in three dimensions and delivering exquisite constraints on cosmology, by …

The 21 cm transition of neutral hydrogen is opening an observational window into the
Cosmic Dawn of the universe—the epoch of first star formation. We use 28 hr of data from …

In this paper we continue to develop the m-mode formalism, a technique for efficient and
optimal analysis of wide-field transit radio telescopes, targeted at 21 cm cosmology. We …