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Young stars in an old bulge: A natural outcome of internal evolution in the Milky Way

Ness, M; Debattista, Victor P.; Bensby, T; Feltzing, Sofia; Roskar, R; Cole, D R; Johnson, J A; Freeman, Kenneth

Description

The center of our disk galaxy, the Milky Way, is dominated by a boxy/peanut-shaped bulge. Numerous studies of the bulge based on stellar photometry have concluded that the bulge stars are exclusively old. The perceived lack of young stars in the bulge strongly constrains its likely formation scenarios, providing evidence that the bulge is a unique population that formed early and separately from the disk. However, recent studies of individual bulge stars using the microlensing technique have...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
URI: http://hdl.handle.net/1885/70781
Source: Astrophysical Journal Letters
DOI: 10.1088/2041-8205/787/2/L19

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