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Paper: A New Picture of the Bulge-Disk Connection Imprinted in Elemental Abundances of Metal Rich Disk Stars
Volume: 396, Formation and Evolution of Galaxy Disks
Page: 165
Authors: Tsujimoto, T.
Abstract: We explore the elemental abundance features of metal-rich disk stars, highlighting the comparisons made with those of the recently revealed Galactic bulge stars. A similarity between two of the comparisons leads to a new theoretical picture of the bulge-disk connection in the Galaxy, where a supermassive black hole resides at the center. We propose that the observational facts of (1) elemental abundance features of metal-rich disk stars characterized by an upturn seen for some elements, and (2) the extended metal-rich tail up to super solar metallicity in the abundance distribution function of disk stars are evidence that an infall outside the disk region is dominated by the gas ejected by the bulge for the recent period of five billion years.
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