Refined Estimates of Carbon Abundances for Carbon-Enhanced Metal-Poor Stars

Details Refined Estimates of Carbon Abundances for Carbon-Enhanced Metal-Poor Stars Refined Estimates of Carbon Abundances for Carbon-Enhanced Metal-Poor Stars

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..990..154r&link_type=abstract

FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 154-156 (2008).

Computer Science

1

Population Ii Stars, Galactic Halo, Abundances, Chemical Composition, Star Formation, Spectroscopy And Spectrophotometry

Scientific paper

We present results from a refined set of procedures for estimation of the metallicities ([Fe/H]) and carbon abundance ratios ([C/Fe]) based on a much larger sample of calibration objects (on the order of 500 stars) then were available to Rossi et al. (2005), due to a dramatic increase in the number of stars with measurements obtained from high-resolution analyses in the past few years. We compare results obtained from a new calibration of the KP and GP indices with that obtained from a custom set of spectral synthesis based on MOOG. In cases where the GP index approaches saturation, it is clear that only spectral synthesis achieve reliable results.

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