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Determination of the spectroscopic stellar parameters for 257 field giant stars

Alves, S. ; Benamati, L. ; Santos, N. C. ; Adibekyan, V. Zh ; Sousa, S. G. ; Israelian, G. ; De Medeiros, J. R. ; Lovis, C. ; Udry, S.

In: Monthly Notices of the Royal Astronomical Society, 2015, vol. 448, no. 3, p. 2749-2765

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    Titre
    • Determination of the spectroscopic stellar parameters for 257 field giant stars
    Auteur
    • Alves, S.. Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile
    • Benamati, L.. Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal
    • Santos, N. C.. Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal
    • Adibekyan, V. Zh. Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal
    • Sousa, S. G.. Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, P-4150-762 Porto, Portugal
    • Israelian, G.. Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
    • De Medeiros, J. R.. Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Campus Universitário Lagoa Nova, 59072-970 Natal, RN, Brasil
    • Lovis, C.. Observatoire de Genève, Université de Genève, 51 ch. des Maillettes, CH-1290 Sauverny, Switzerland
    • Udry, S.. Observatoire de Genève, Université de Genève, 51 ch. des Maillettes, CH-1290 Sauverny, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2015, vol. 448, no. 3, p. 2749-2765. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:294084
    Summary
    The study of stellar parameters of planet-hosting stars, such as metallicity and chemical abundances, help us to understand the theory of planet formation and stellar evolution. Here, we present a catalogue of accurate stellar atmospheric parameters and iron abundances for a sample of 257K and G field evolved stars that are being surveyed for planets using precise radial-velocity measurements as part of the Coralie programme to search for planets around giants. The analysis was done using a set of high-resolution and high-signal-to-noise Ultraviolet and Visible Echelle Spectrograph spectra. The stellar parameters were derived using Fei and ii ionization and excitation equilibrium methods. To take into account possible effects related to the choice of the lines on the derived parameters, we used three different iron line-list sets in our analysis, and the results differ among themselves by a small factor for most of stars. For those stars with previous literature parameter estimates, we found very good agreement with our own values. In the present catalogue, we are providing new precise spectroscopic measurements of effective temperature, surface gravity, microturbulence, and metallicity for 190 stars for which it has not been found or published in previous articles