EDGE – Dark matter or astrophysics? Breaking dark matter heating degeneracies with H I rotation in faint dwarf galaxies
Low-mass dwarf galaxies are expected to reside within dark matter haloes that have a pristine, ‘cuspy’ density profile within their stellar half-light radii. This is because they form too few stars to significantly drive dark matter heating through supernova-driven outflows. Here, we study such simulated faint systems (104 ≤ M* ≤ 2 × 106 M) drawn from high-resolution (3 pc) cosmological simulation
