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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 Letter, we present abundances of four α-elements (Mg, Si, Ca, and Ti) and iron for a subsample of 212 red giant branch and 31 ...

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Publisher copy:
10.1088/2041-8205/721/2/L92

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Journal:
Astrophysical Journal Letters
Volume:
721
Issue:
2 PART 2
Publication date:
2010-10-01
DOI:
EISSN:
2041-8213
ISSN:
2041-8205
URN:
uuid:4828f0ae-2496-4885-9988-384a7ffcb685
Source identifiers:
212419
Local pid:
pubs:212419

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