Gravitational waves are a unique probe of the early Universe, as the Universe is transparent
to gravitational radiation right back to the end of inflation. This review summarizes detection …

Primordial black holes are under intense scrutiny since the detection of gravitational waves
from mergers of Solar-mass black holes in 2015. More recently, the development of …

In this Letter, we derive for the first time a characteristic three-peaked GW signal within the
framework of no-scale Supergravity, being the low-energy limit of Superstring theory. We …

Pulsar timing array collaborations have recently announced the discovery of a stochastic
gravitational wave (GW) background at nanohertz frequencies. We analyze the GW signals …

It has been recently proposed that Hawking evaporation might slow down after a black hole
has lost about half of its mass. Such an effect, called" memory burden", is parameterized as …

In the post-LIGO era, there has been a lot of focus on primordial black holes (PBHs) heavier
than∼ 10 15 g as potential dark matter (DM) candidates. We point out that the branch of the …

A bstract Light primordial black holes (PBHs) with masses smaller than 10 9 g (10− 24 M⊙)
evaporate before the onset of Big-Bang nucleosynthesis, rendering their detection rather …

Many cosmological phenomena lead to the production of primordial black holes in the early
Universe. These phenomena often create a population of black holes with extended mass …

Ultra-light primordial black holes (PBHs) with masses M PBH< 5× 10 8 g can dominate
transiently the energy budget of the Universe and reheat the Universe through their …

The no-scale flipped SU (5) superstring framework constitutes a very promising paradigm for
physics below the Planck scale providing us with a very rich cosmological phenomenology …