We provide a review on the state-of-the-art of gravitational waves induced by primordial
fluctuations, so-called induced gravitational waves. We present the intuitive physics behind …

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 …

We study whether the signal seen by pulsar timing arrays (PTAs) may originate from
gravitational waves (GWs) induced by large primordial perturbations. Such perturbations …

The most conservative interpretation of the nHz stochastic gravitational wave background
(SGWB) discovered by NANOGrav and other pulsar timing array (PTA) collaborations is …

The NANOGrav and other pulsar timing arrays (PTAs) have recently announced evidence
for nHz gravitational waves (GWs) that may originate from supermassive black hole (SMBH) …

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

Abstract Recently, the North American Nanohertz Observatory for Gravitational Waves
(NANOGrav) claimed the detection of a stochastic common-spectrum process of the pulsar …

A bstract Hawking evaporation of primordial black holes (PBHs) can facilitate the generation
of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the …

The stochastic gravitational wave background (SGWB) offers a new opportunity to observe
signals of primordial features from inflationary models. We study their detectability with future …

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 …