Constraining cosmological parameters using void statistics from the SDSS survey
Aims. We aim to constrain the amplitude of the linear spectrum of density fluctuations (σ 8), the matter density parameter (Ω m), the Hubble constant (H 0), Γ =...
Constraining the inner density slope of massive galaxy clusters
We determine the inner density profiles of massive galaxy clusters (M 200 > 5 × 10 14 M ☉) in the Cluster-EAGLE (C-EAGLE) hydrodynamic simulations, and...
Constraints on cosmological parameters from recent measurements of cosmic microwave background anisotropy
We present new results from a study of recent cosmic microwave background (CMB) observations which provide the first strong evidence for the existence of a...
Constraints on the Abundance of Primordial Black Holes from X-Ray Quasar Microlensing Observations: Substellar to Planetary Mass Range
We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of...
Constraints on Ultra-Light Dark Matter from Galactic Rotation Curves
Bosonic ultra-light dark matter (ULDM) in the mass range m ~ $10^{-22} - 10^{-21} \rm eV$ has been invoked as a motivated candidate with new input for the small...
In the first part of this talk I will present a historical review of the CMB observations, one of the most powerful cosmological probes. Following the first...
Cosmological giants and elves: galaxy formation and the small scale of cold dark matter
I will review the status of our understanding of galaxy formation in the prevailing cold dark matter paradigm. After reviewing the successes and failures of the...
Cosmology on small scales: the structure of (mostly) dark matter halos
The standard model of cosmology -- the ``Lambda cold dark matter'' model -- is based on the idea that the dark matter is a collisionless elementary particle...