MISHENINA, T; SOUBIRAN, C; CHARBONNEL, C; KATSOVA, M; NIZAMOV, B

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MISHENINA, T

SOUBIRAN, C
M2A 2019

CHARBONNEL, C
Institut de recherche en astrophysique et planétologie [IRAP]

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Communication dans un congrès

Ce document a été publié dans

Memorie della Societa Astronomica Italiana, 2019-11-18, Monte Porzio Catone.

Résumé en anglais

To clarify the reasons for the dispersion of Li in the atmosphere of solar type stars, a set of 56 solar analogs including 22 solar twins is analysed based on spectra obtained with the ELODIE spectrograph at Observatoire de Haute Provence (France). Lithium abundances are derived by comparing observed and synthetic spectra in the region of Li I line 6707 Å in LTE approximation. The dependencies of the Li abundances on effective temperature Teff, age, rotational velocities vsini and chromospheric activity log R'HK were constructed and analyzed in the frame of stellar evolution theories. The results obtained are generally consistent with theories considering induced-rotational mixing.< Réduire

Mots clés en anglais

Stars

abundances -Stars

evolution -Stars

solar-type

Origine

Importé de hal

Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804