Galaxy Genesis -- unravelling the epoch of dissipation in the early disk

Abstract

So how did the Galactic disk form and can the sequence of events ever be unravelled from the vast stellar inventory? This will require that some of the residual inhomogeneities from prehistory escaped the dissipative process at an early stage. Fossil hunting to date has concentrated mostly on the stellar halo, but a key source of information will be the thick disk. This is believed to be a 'snap frozen' relic which formed during or shortly after the last major epoch of dissipation, or it may have formed from infalling systems early in the life of the Galaxy. As part of the KAOS Galaxy Genesis project, we explore the early history of the halo and the thick disk by looking for discrete substructures, either due to infall or in situ star formation, through chemical tagging. This will require high signal to noise, echelle spectroscopy of up to a million stars throughout the disk. Our program has a short-term and a long-term goal.

5th Workshop on Galaxy Chemodynamics, eds. B.K. Gibson, D. Kawata; PASA, accepted (11 pages, 6 GIF figures, 3 style files)

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Cited by in corpus (28)

• The GALAH Survey: Scientific Motivation
• Star Clusters Across Cosmic Time
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• Pre-galactic metal enrichment - The chemical signatures of the first stars
• Chemical Homogeneity in Collinder 261 and Implications for Chemical Tagging
• Chemical Homogeneity in the Hyades
• The Dawes Review 8: Measuring the Stellar Initial Mass Function
• The Hyades open cluster is chemically inhomogeneous
• Principal Component Analysis on Chemical Abundances Spaces
• The Kinematics of Thick Disks in External Galaxies
• Phylogeny of the Milky Way's inner disk and bulge populations: Implications for gas accretion, (the lack of) inside-out thick disk formation, and quenching
• Testing the chemical tagging technique with open clusters
• Prospects for chemically tagging stars in the Galaxy
• Chemical signatures of the first star clusters
• Prospects for Measuring Abundances of >20 Elements with Low-resolution Stellar Spectra
• The GALAH survey: Chemical Tagging of Star Clusters and New Members in the Pleiades
• Quantifying Chemical Tagging: Towards Robust Group Finding in the Galaxy
• Reconstructing fossil sub-structures of the Galactic disk: clues from abundance patterns of old open clusters and moving groups
• Reconstructing the Accretion History of the Galactic Stellar Halo from Chemical Abundance Ratio Distributions
• Is it possible to reveal the lost siblings of the Sun?
• Galactic Kinematics from OB3 Stars with Distances determined from Interstellar Ca II Lines
• Searching for Possible Siblings of the Sun from a Common Cluster based on Stellar Space Velocities
• The Gaia-ESO Survey: Chemical tagging in the thin disk. Open clusters blindly recovered in the elemental abundance space
• Structure and Evolution of the Milky Way
• Search for Kinematic Siblings of the Sun Based on Data from the XHIP Catalog
• Two-point correlation function studies for the Milky Way: discovery of spatial clustering from disk excitations and substructure
• GALAH Survey: Chemically Tagging the Thick Disk
• Improving white dwarfs as chronometers with Gaia parallaxes and spectroscopic metallicities