SIMBAD references

2013MNRAS.434.1681C - Mon. Not. R. Astron. Soc., 434, 1681-1691 (2013/September-2)

The near-infrared CaII triplet as a metallicity indicator - II. Extension to extremely metal-poor metallicity regimes.


Abstract (from CDS):

We extend our previous calibration of the infrared Caii triplet (CaT) as a metallicity indicator to the metal-poor regime by including observations of 55 field stars with [Fe/H] down to -4.0dex. While we previously solved the saturation at high metallicity using a combination of a Lorentzian and a Gaussian to reproduce the line profiles, in this paper we address the non-linearity at low metallicity following the suggestion of Starkenburg et al. of adding two non-linear terms to the relation among the [Fe/H], luminosity and strength of the calcium triplet lines. Our calibration thus extends from -4.0 to +0.5 in metallicity and is presented using four different luminosity indicators: V - VHB, MV, MI and MK. The calibration obtained in this paper results in a tight correlation between [Fe/H] abundances measured from high-resolution spectra and [Fe/H] values derived from the CaT, over the whole metallicity range covered.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): techniques: spectroscopic - stars: abundances - stars: late-type

VizieR on-line data: <Available at CDS (J/MNRAS/434/1681): table1.dat table2.dat table3.dat refs.dat>

Simbad objects: 91

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