Recalibration of the H$\alpha$ surface brightness-radius relation for planetary nebulae using Gaia DR3: new distances and the Milky Way oxygen radial gradient

Oscar Cavichia, Hektor Monteiro, Miguel Cerviño +3

The spatial distribution of chemical elements in the Galactic disk provides key constraints on models of galaxy evolution. However, studies using planetary nebulae (PNe) as tracers…