Metal Abundance Calibration of the Ca II Triplet Lines in RR Lyrae Stars

Details Metal Abundance Calibration of the Ca II Triplet Lines in RR Lyrae Stars Metal Abundance Calibration of the Ca II Triplet Lines in RR Lyrae Stars

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734217g&link_type=abstract

American Astronomical Society, AAS Meeting #217, #342.17; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gaia satellite is likely to observe thousands of RR Lyrae Stars a with small spectral range, between 8500 Å to 8750 Å, at a resolution of 10,000. In order to derive metallicity from Gaia, we are obtaining numerous spectra of RR Lyrae stars at a resolution of 30,000 with the APO 3.5m echelle spectrograph. We will correlate Ca II triplet abundances with Fe II abundances, analogous to Preston's (1959) use of Ca II K line to estimate metallicity in RR Lyrae Stars. We will then redrive these relations at the Gaia spectral resolution.

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