We review the landscape of QCD axion models. Theoretical constructions that extend the
window for the axion mass and couplings beyond conventional regions are highlighted and …

Axions comprise a broad class of particles that can play a major role in explaining the
unknown aspects of cosmology. They are also well-motivated within high energy physics …

Axions are well-motivated dark matter candidates with simple cosmological production
mechanisms. They were originally introduced to solve the strong CP problem, but also arise …

I present an introduction and topical review on axions as a dark matter candidate. Emphasis
is placed on issues surrounding the cosmology of axion dark matter that are relevant for …

The last decade has seen unprecedented effort in dark matter model building at all mass
scales coupled with the design of numerous new detection strategies. Transformative …

In recent decades, several detector technologies have been developed with the quest to
directly detect dark matter interactions and to test one of the most important unsolved …

Abstract Euclid is a European Space Agency medium-class mission selected for launch in
2020 within the cosmic vision 2015–2025 program. The main goal of Euclid is to understand …

Compact objects occupy a pivotal role in the exploration of Nature. The interest spans from
the role of compact objects in astrophysics to their detection through various methods …

Abstract Euclid is a European Space Agency medium-class mission selected for launch in
2019 within the Cosmic Vision 2015–2025 program. The main goal of Euclid is to …

We evaluate the efficiency of axion production from spatially random initial conditions in the
axion field, so a network of axionic strings is present. For the first time, we perform numerical …