Galaxies with grains: unraveling dust evolution and extinction curves with hydrodynamical simulations

Understand

We introduce a model for dust evolution in the RAMSES code for simulations of galaxies with a resolved multiphase interstellar medium.

• Dust is modelled as a fluid transported with the gas component, and is decomposed into two sizes, 5 nm and 0.1 $\mu\rm m$, and two chemical compositions for carbonaceous and silicate grains.
• Using a suite of isolated disc simulations with different masses and metallicities, the simulations can explore the role of these processes in shaping the key properties of dust in galaxies.
• The simulated Milky Way analogue reproduces the dust-to-metal mass ratio (DTM), depletion factors, size distribution and extinction curves of the Milky Way.