Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

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

A bstract In recent years, several pulsar timing array collaborations have reported first hints
for a stochastic gravitational wave background at nano-Hertz frequencies. Here we …

We study the effects of long-lived massive particles, which decayed during the big-bang
nucleosynthesis (BBN) epoch, on the primordial abundance of light elements. Compared to …

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

We compute cosmic microwave background (CMB) anisotropy constraints on exotic forms of
energy injection in electromagnetic (em) channels over a large range of timescales. We …

Deviations from the blackbody spectral energy distribution of the cosmic microwave
background (CMB) are a precise probe of physical processes active both in the early …

Abstract PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to
ESA in May 2013 as a large-class mission for investigating within the framework of the ESA …

The recent detection of a stochastic gravitational wave background (SGWB) at nanohertz
frequencies by pulsar timing arrays (PTAs) has sparked a flurry of interest. Beyond the …

Light dark photons are subject to various plasma effects, such as Debye screening and
resonant oscillations, which can lead to a more complex cosmological evolution than is …