APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Victor Robles Sanchez (Rensselaer Polytechnic Institute)
Title: Implications of a quantum-like nature for dark matter in our Milky Way halo and its dwarf galaxy population
Date (JST): Wed, Jun 04, 2025, 15:30 - 17:00
Place: Seminar Room A
Abstract: Satellite abundance in Milky Way-like halos plays a crucial role in distinguishing dark matter models, in particular, in dark matter models where a suppression of substructure is expected below a mass scale. One model that has gained recent interest is the Quantum/Fuzzy or Wave Dark Matter model, where the dark matter is assumed to be very small (~10-22-10-21eV/c2), this model predicts a sharp suppression of small-scale structures. Capturing the intrinsic quantum field inference has been numerically challenging with current codes. I will show that with the new implemented fluid-wave hybrid scheme in the code GAMER-2 code, we have achieved a self-consistent Wave Dark Matter cosmological simulation of a Milky Way-size halo with a dark Matter particle mass of m=2x10-23eV, which simultaneously resolves the solitonic core of the host halo and captures the complex tidal evolution of subhaloes down to z=0. In this talk, I will discuss the implications of the wave dark matter in dwarf mass halos in isolation and the evolution of Wave DM subhalos inside a MW-mass host. I will mention some consequences on the current and future constraints to the quantum-like hypothesis from observations of the satellite abundance and dynamical mass content of nearby dwarf galaxies.