The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

Although the dark matter is usually assumed to be made up of some form of elementary
particle, primordial black holes (PBHs) could also provide some of it. However, various …

Primordial black holes (PBHs) represent a natural candidate for one of the components of
the dark matter (DM) in the Universe. In this review, we shall discuss the basics of their …

Abstract The LIGO and Virgo Interferometers have so far provided 11 gravitational-wave
(GW) observations of black-hole binaries. Similar detections are bound to become very …

Primordial black holes (PBHs), formed out of large overdensities in the early Universe, are a
viable dark matter (DM) candidate over a broad range of masses. Ultralight, asteroid-mass …

Primordial Black Holes (PBH) can form in the early universe and might comprise a
significant fraction of the dark matter. Interestingly, they are accompanied by the generation …

Mainly motivated by the recent GW190521 mass gap event which we take as a benchmark
point, we critically assess if binaries made of a primordial black hole and a black hole of …

Primordial black hole (PBH) binaries forming in the early Universe may contribute to the
merger events observed by the LIGO–Virgo–KAGRA collaborations. Moreover, the inferred …

The black holes detected by current and future interferometers can have diverse origins.
Their expected mass and spin distributions depend on the specifics of the formation …

It is shown that a mechanism of PBH formation from high-baryon bubbles with log-normal
mass spectrum naturally leads to the central mass of the PBH distribution close to ten solar …