Observational evidence for a large local galaxy underdensity goes back to the 1990’s and, like the "Hubble tension", remains unexplained by standard 𝜦CDM. Wong et al (2022) show that this “Local Hole” covers >90% of the sky out to ~200Mpc with an ~20-30% underdensity, consistent with previous observations (e.g. Keenan, Barger and Cowie, 2014). We have speculated that this underdensity could...
We investigate the host dark matter halo masses of AGNs across various cosmological simulations of galaxies (Illustris, IllustrisTNG, TNG-Cluster, Simba and EAGLEs). In particular we examine the co-evolution of the luminosity of AGNs in relation to the mass of their host dark matter halo from z=7 to z=3. Despite differences in AGN feedback implementations and SMBH seeding prescriptions across...
Galaxy evolution follows the tapestry set by cosmology, but is modulated by central supermassive black holes. Human lifetimes limit the study of the stochastic gas motion from halos to the event horizon. Nevertheless, the last few decades have revealed a probabilistic multidimensional link between AGN outflows, black hole mass, accretion, galaxy mass, star-formation, morphology, and...
Galaxies are distributed in a complex filamentary network of matter called the cosmic web. It remains debated which is the overall impact of the cosmic web in processing cold gas of galaxies, as they move through large-scale filaments around the clusters down to the densest regions of the cluster cores. I will present the results of a large observational campaign, mainly exploiting IRAM...
Dark matter (DM) remains one of the central unresolved questions in modern physics. The majority of terrestrial direct detection experiments for DM rely on the assumption that the local DM velocity distribution conforms to the Standard Halo Model (SHM). However, perturbations arising from merger events can induce deviations from the SHM. Previous studies have suggested that the local stellar...
