Radio astronomy has changed. For years it studied relatively rare sources, which emit
mostly non-thermal radiation across the entire electromagnetic spectrum, ie radio quasars …

All cosmological observations to date are consistent with adiabatic, Gaussian and nearly
scale invariant initial conditions. These findings provide strong evidence for a particular …

After stars formed in the early Universe, their ultraviolet light is expected, eventually, to have
penetrated the primordial hydrogen gas and altered the excitation state of its 21-centimetre …

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 …

The Square Kilometre Array (SKA) is a planned large radio interferometer designed to
operate over a wide range of frequencies, and with an order of magnitude greater sensitivity …

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 …

We revisit the global 21 cm signal calculation incorporating a possible radio background at
early times, and find that the global 21 cm signal shows a much stronger absorption feature …

This Voyage 2050 paper highlights the unique science opportunities using spectral
distortions of the cosmic microwave background (CMB). CMB spectral distortions probe …

The region surrounding the center of the Milky Way is both astrophysically rich and complex,
and is predicted to contain very high densities of dark matter. Utilizing three years of data …

We calculate the post-recombination contribution to the cosmic microwave background
(CMB) spectral distortion due to general exotic energy injections, including dark matter (DM) …