Galaxies and their dark-matter haloes have posed several challenges to the dark energy
plus cold dark matter (Λ CDM) cosmological model. These discrepancies between …

Over recent decades, cosmological simulations of galaxy formation have been instrumental
in advancing our understanding of structure and galaxy formation in the Universe. These …

Accurately predicting the demographics of dark matter (DM) substructure is of paramount
importance for many fields of astrophysics, including gravitational lensing, galaxy evolution …

We derive a lower bound on the merger rate of primordial black hole (PBH) binaries by
estimating the maximal fraction of binaries that were perturbed between formation in the …

To gain understanding of the complicated, non-linear, and numerical processes associated
with the tidal evolution of dark matter subhaloes in numerical simulation, we perform a large …

The diffuse light that spreads through groups and clusters of galaxies is made of free-floating
stars not bound to any galaxy. This is known as the intracluster light (ICL) and holds …

Cold dark matter (CDM) constitutes most of the matter in the Universe. The interplay
between dark and luminous matter in dense cosmic environments, such as galaxy clusters …

Well-motivated elementary particle candidates for the dark matter, such as the sterile
neutrino, behave as warm dark matter (WDM). For particle masses of the order of a keV, free …

Satellite galaxies in groups and clusters are more likely to have low star formation rates
(SFRs) and lie on the 'red sequence'than central ('field') galaxies. Using galaxy group/cluster …

We use the Aquarius simulations to show that the most massive subhaloes in galaxy-mass
dark matter (DM) haloes in Λ cold dark matter (ΛCDM) are grossly inconsistent with the …