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Origins of the Thick Disk as Traced by the Alpha-Elements of Metal-Poor Giant Stars Selected from RAVE

Abstract:

Theories of thick disk formation can be differentiated by measurements of stellar elemental abundances. We have undertaken a study of metal-poor stars selected from the RAVE spectroscopic survey of bright stars to establish whether or not there is a significant population of metal-poor thick-disk stars ([Fe/H] <~ -1.0) and to measure their elemental abundances. In this paper, we present abundances of four alpha-elements (Mg, Si, Ca, Ti) and iron for a subsample of 212 RGB and 31 RC/HB star...

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Authors


Ruchti, GR More by this author
Fulbright, JP More by this author
Gilmore, GF More by this author
Bienaymé, O More by this author
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Journal:
Astrophysical Journal Letters
Volume:
721
Pages:
L92-L96
Publication date:
2010-08-23
URN:
uuid:acd1e8b7-66f8-43c5-acd0-ac90d88645d4
Source identifiers:
167431
Local pid:
pubs:167431

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