The interplay of internal and external processes in the buildup of disk galaxies: thick-disk star formation histories in AURIGA simulations

• DOI: 10.1017/s174392132200463x
• Publication Date: 2023-06-09T10:03:48Z
• Authors: Francesca Pinna; Daniel Walo-Martín; Robert J.J. Grand
• Keywords: Thick disk; Stellar population; Thin disk

Abstract Recent integral-field spectroscopy observations have revealed that thick- and thin-disk star-formation histories are regulated by the interplay of internal external processes. We analyze stellar-population properties 24 spiral galaxies from AURIGA zoom-in cosmological simulations, to offer a more in-depth interpretation observable properties. present edge-on maps stellar age, metallicity [Mg/Fe] abundance, we extract chemical-evolution thin thick disks. Both show signs between chemical enrichment gas star accretion. Thick disks particularly complex populations, including an in-situ component, formed both slowly enriched accreted pristine gas, additional significant fraction ex-situ stars.