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Title:
Empirical calibration of the near-infrared Ca ii triplet - I. The stellar library and index definition
Authors:
Cenarro, A. J.; Cardiel, N.; Gorgas, J.; Peletier, R. F.; Vazdekis, A.; Prada, F.
Affiliation:
AA(Departmento de Astrofísica, Fac. de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain ), AB(Departmento de Astrofísica, Fac. de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain ), AC(Departmento de Astrofísica, Fac. de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain ), AD(School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD ), AE(Department of Physics, University of Durham, South Road, Durham DH1 3LE ), AF(Observatorio de Calar Alto, Almería, Spain)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 326, Issue 3, pp. 959-980. (MNRAS Homepage)
Publication Date:
09/2001
Origin:
MNRAS
MNRAS Keywords:
STARS: ABUNDANCES, STARS: FUNDAMENTAL PARAMETERS, GLOBULAR CLUSTERS: GENERAL, GALAXIES: STELLAR CONTENT
DOI:
10.1046/j.1365-8711.2001.04688.x
Bibliographic Code:
2001MNRAS.326..959C

Abstract

A new stellar library at the near-IR spectral region developed for the empirical calibration of the Caii triplet and stellar population synthesis modelling is presented. The library covers the range λλ8348-9020 at 1.5-Å (FWHM) spectral resolution, and consists of 706 stars spanning a wide range in atmospheric parameters. We have defined a new set of near-IR indices, CaT*, CaT and PaT, which mostly overcome the limitations of previous definitions, the former being specially suited for the measurement of the Caii triplet strength corrected for the contamination from Paschen lines. We also present a comparative study of the new and the previous Ca indices, as well as the corresponding transformations between the different systems. A thorough analysis of the sources of index errors and the procedure to calculate them is given. Finally, index and error measurements for the whole stellar library are provided together with the final spectra.

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Part 1     Part  2     Catalog Description     Catalog Description     Part  3     Part  4    

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