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A new stellar library in the K band for the empirical calibration of the CO index

Published online by Cambridge University Press:  01 December 2006

E. Mármol-Queraltó ,
N. Cardiel ,
A. J. Cenarro ,
A. Vazdekis ,
J. Gorgas  and
R. F. Peletier
E. Mármol-Queraltó
Affiliation:
Dpto. Astrofísica, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain email: emq@astrax.fis.ucm.es
N. Cardiel
Affiliation:
Dpto. Astrofísica, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain email: emq@astrax.fis.ucm.es
A. J. Cenarro
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38200, La Laguna, Spain
A. Vazdekis
Affiliation:
Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38200, La Laguna, Spain
J. Gorgas
Affiliation:
Dpto. Astrofísica, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain email: emq@astrax.fis.ucm.es
R. F. Peletier
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, 9700 AV Groningen, The Netherlands
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Abstract

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Here we present the results of an observational program aimed at providing a stellar library in the K band with an appropriate coverage of physical stellar parameters (effective temperature, gravity and metallicity) to be used for stellar population synthesis models. In particular, we study the behavior of the CO feature at 2.3 μm as a function of the stellar parameters and we will compute empirical fitting functions that can be easily implemented into stellar population models to provide accurate predictions for integrated CO strengths that will help to face outstanding problems in galaxy formation and evolution.

Keywords

instrumentation: spectrograph – infrared: stars – atlases: starsfundamental parameters – galaxies: stellar content

References

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