Short talk with Ryan McKinnon

Date & Time

SEMINAR: 12:45 - 1:15 pm


Dust Evolution in Cosmological Simulations

We present the first cosmological simulations using the moving-mesh code AREPO
to study the evolution of dust and metals within galaxies. These simulations
enable us to track the lifecycle of dust, including production in stars,
evolution in the interstellar medium, and transport via galactic winds. Using
both zoom-in and full-volume cosmological runs, we analyze the dust formation
history of individual galaxies and predict the dust mass function at a variety
of redshifts, finding agreement with observed values. We investigate several
scaling relations tying dust mass to star formation that can help observers
estimate dust masses, and we demonstrate for the first time the impact of dust
on the thermodynamic state of galaxy clusters. To study dust dynamics in the
ISM, we present new work to track the drag force coupling dust grains to
hydrodynamic motion and implement a novel model to self-consistently evolve the
dust grain size distribution on the fly in cosmological simulations. This work
will explore how various galactic processes shape the interstellar grain size
distribution and allow more accurate creation of synthetic galaxy extinction
curves. These methods will enable cosmological simulations to more
realistically treat dust extinction in generating mock galaxy images.

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