We review numerous arguments for primordial black holes (PBHs) based on observational
evidence from a variety of lensing, dynamical, accretion and gravitational-wave effects. This …

Axion-like particle (ALP) dark matter shows distinctive behavior on scales where wavelike
effects dominate over self-gravity. Ultralight axions are candidates for fuzzy dark matter …

Galaxy clusters magnify background objects through strong gravitational lensing. Typical
magnifications for lensed galaxies are factors of a few but can also be as high as tens or …

The detection of gravitational waves from mergers of tens of Solar mass black hole binaries
has led to a surge in interest in primordial black holes (PBHs) as a dark matter candidate …

Unveiling the true nature of dark matter, which manifests itself only through gravity, is one of
the principal quests in physics. Leading candidates for dark matter are weakly interacting …

We constrain the abundance of primordial black holes (PBH) using 2622 microlensing
events obtained from 5-years observations of stars in the Galactic bulge by the Optical …

The nature of dark matter (DM) remains unknown despite very precise knowledge of its
abundance in the Universe. An alternative to new elementary particles postulates DM as …

We report the discovery of Mothra, an extremely magnified monster star, likely a binary
system of two supergiant stars, in one of the strongly lensed galaxies behind the galaxy …

We search for signatures of gravitational lensing in the binary black hole events detected by
Advanced LIGO and Virgo during their first two observational runs. In particular, we look for …

Just like light, gravitational waves (GWs) are deflected and magnified by gravitational fields
as they propagate through the Universe. However, their low frequency, phase coherence …