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 …

Ultra-light primordial black holes, with masses m PBH< 10 9 g, evaporate before big-bang
nucleosynthesis and can therefore not be directly constrained. They can however be so …

The gravitational potential of initially Poisson distributed primordial black holes (PBH) can
induce a stochastic gravitational-wave background (SGWB) at second order in cosmological …

The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has yielded
unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use …

Cosmological α-attractors stand out as particularly compelling models to describe inflation in
the very early universe, naturally meeting tight observational bounds from cosmic microwave …

We discuss the footprint of evaporation of primordial black holes (PBHs) on stochastic
gravitational waves (GWs) induced by scalar perturbations. We consider the case where …

Primordial black holes (PBHs) can generically form in inflationary setups through the
collapse of enhanced cosmological perturbations, providing us access to the early Universe …

Primordial black hole (PBH) fluctuations can induce a stochastic gravitational wave
background at second order, and since this procedure is sensitive to the underlying …

The gravitational potential of a gas of initially randomly distributed primordial black holes
(PBH) can induce a stochastic gravitational-wave (GW) background through second-order …

After the end of inflation, the inflaton field oscillates around a local minimum of its potential
and decays into ordinary matter. These oscillations trigger a resonant instability for …