Gas accretion onto galactic discs in cosmological simulations of galaxy formation

FEDERICO G. IZA; SEBASTIÁN E. NUZA; CECILIA SCANNAPIECO

Córdoba

Conferencia; Friends of Friends (FoF) meeting 2021; 2021

OAC, IATE

In the standard paradigm of galaxy formation and evolution, the baryonic component of galaxies forms from the collapse and condensation of gas within dark matter haloes, and later grows from continuous accretion of mass, both in diffuse form and in mergers with other systems.In the disc region, the cosmological accretion of gas combines with the outflows resulting from supernovae, affecting the hydrodynamical and structural properties of the disc and producing gas flows in the vertical and radial directions. Despite gas accretion is crucial for the evolution of the disc, it is only recently that this process has been studied in a cosmological context (e.g., Nuza et al. 2019). In this work, we use a simulation of the Auriga Project, a suite of magneto-hydrodynamical, zoom-in cosmological simulations of Milky Way-like galaxies, to study the temporal dependency of gas accretion onto the disc.