Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2K022

CARMENES AT PPVI. 5. CALIBRATING THE METALLICITY OF M-DWARFS WITH WIDE VISUAL BINARIES

Montes, D. (Universidad Complutense de Madrid, Spain)
Alonso-Floriano, F. J. (Universidad Complutense de Madrid, Spain)
Tabernero, H. M. (Universidad Complutense de Madrid, Spain)
Caballero, J. A. (Centro de Astrobiología, Spain)
González Hernández, J. I. (Instituto de Astrofísica de Canarias, Spain)
Klutsch, A. (Universidad Complutense de Madrid, Spain)
Cortés-Contreras, M. (Universidad Complutense de Madrid, Spain)

Abstract:
We summarise our on-going project aimed at calibrating the metallicity of M dwarfs. We have selected a large sample of physical binaries composed of an F-, G- or K-dwarf primary and an M-dwarf secondary. High-resolution spectra of the primary components are being analysed in order to determine, in a uniform way, accurate atmospheric parameters, metallicity and abundance of different elements. From low- resolution spectra of the secondary components we derived reliable spectral types and metallicity- dependent spectral indices. Using all this information, we are improving the current spectroscopic and photometric calibrations of M-dwarf metallicity, and testing some new ones. The resulting calibrations will be very useful in the characterisation of the input sample of exoplanet search programs around M dwarfs. In particular, we share some of our targets with CARMENES.

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