We update the constraints on the fraction of the Universe that may have gone into primordial
black holes (PBHs) over the mass range 10− 5 to 10 50 g. Those smaller than∼ 10 15 g …

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 …

We consider primordial black hole (PBH) production in inflationary α-attractors. We discuss
two classes of models, namely models with a minimal polynomial superpotential as well as …

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 …

We consider the observational constraints on stupendously large black holes (SLABs) in the
mass range. These have attracted little attention hitherto, and we are aware of no published …

In the recent years, primordial black holes (PBHs) have emerged as one of the most
interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could …

Constraining the inflationary epoch is one of the aims of modern cosmology. In order to fully
exploit current and future small-scale observations, it is necessary to devise tools to directly …

We consider black holes which form from an initially spherically symmetric super-Hubble
perturbation of a cosmological background filled by a perfect fluid p= w ρ with w∊(0, 1] …

We study the generation of primordial black holes (PBH) in a single field inflection point
model of inflation wherein the effective potential is expanded up to the sextic order and the …

The Universe may pass through an effectively matter-dominated epoch between inflation
and big bang nucleosynthesis during which gravitationally bound structures can form on …