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 …

In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

It is commonly assumed that the energy density of the Universe was dominated by radiation
between reheating after inflation and the onset of matter domination 54,000 years later …

In this paper we present a new scenario where massive primordial black holes (PBHs) are
produced from the collapse of large curvature perturbations generated during a mild …

Compared to primordial perturbations on large scales, roughly larger than 1 Mpc, those on
smaller scales are not severely constrained. We revisit the issue of probing small-scale …

In recent years, observations of the Sunyaev-Zeldovich (SZ) effect have had significant
cosmological implications and have begun to serve as a powerful and independent probe of …

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 …

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

We compare primordial black hole (PBH) constraints on the power spectrum and mass
distributions using the traditional Press Schechter formalism, peaks theory, and a recently …

We revise primordial black holes (PBHs) production in the axion-curvaton model, in light of
recent developments in the computation of their abundance accounting for non …