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The Emergence of the Thick Disk in a Cold Dark Matter Universe

Brook, Chris; Kawata, Daisuke; Gibson, Bradley K; Freeman, Kenneth

Description

The disk galaxy simulated using our chemodynamic galaxy formation code, GCD+, is shown to have a thick-disk component. This is evidenced by the velocity dispersion versus age relation for solar neighborhood stars, which clearly shows an abrupt increase in velocity dispersion at a look-back time of approximately 8 Gyr, and is in excellent agreement with observation. These thick-disk stars are formed from gas that is accreted to the galaxy during a chaotic period of hierarchical clustering at...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
URI: http://hdl.handle.net/1885/80690
Source: Astrophysical Journal, The
DOI: 10.1086/422709

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