Journal
ASTROPHYSICS AND SPACE SCIENCE
Volume 341, Issue 1, Pages 89-92Publisher
SPRINGER
DOI: 10.1007/s10509-012-1033-6
Keywords
RR Lyrae; Abundances; Gaia
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Funding
- New York Community Trust
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The Gaia satellite is likely to observe thousands of RR Lyrae Stars with a small spectral range, between 8470 to 8750 , at a resolution of 11,500. In order to derive metallicity from Gaia, we have obtained numerous spectra of RR Lyrae stars at a resolution of 35,000 with the Apache Point Observatory 3.5 m echelle spectrograph. We have correlated Ca(II) triplet line strengths with metallicity as derived from Fe(II) abundances, analogous to Preston (Astrophys. J., 130:507, 1959) use of the Ca(II) K line to estimate metallicity in RR Lyrae Stars.
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