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- W3000417166 abstract "Observations suggest that the structural parameters of disk galaxies have not changed greatly since redshift 1. We examine whether these observations are consistent with a cosmology in which structures form hierarchically. We use SPH/N-body galaxy-scale simulations to simulate the formation and evolution of Milky-Way-like disk galaxies by fragmentation, followed by hierarchical merging. The simulated galaxies have a thick disk, that forms in a period of chaotic merging at high redshift, during which a large amount of α-elements are produced, and a thin disk, that forms later and has a higher metallicity. Our simulated disks settle down quickly and do not evolve much since redshift z ∼ 1, mostly because no major mergers take place between z = 1 and z = 0. During this period, the disk radius increases (inside-out growth) while its thickness remains constant. These results are consistent with observations of disk galaxies at low and high redshift." @default.
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- W3000417166 date "2006-01-01" @default.
- W3000417166 modified "2023-10-17" @default.
- W3000417166 title "The Evolving Structure of Galactic Disks" @default.
- W3000417166 hasPublicationYear "2006" @default.
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