Solar twins: lithium abundance scatter
Language
en
Communication dans un congrès
This item was published in
Memorie della Societa Astronomica Italiana, 2019-11-18, Monte Porzio Catone.
English Abstract
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 ...Read more >
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.Read less <
English Keywords
Stars
abundances -Stars
evolution -Stars
solar-type
Origin
Hal imported