MISHENINA, Tamara V.; SOUBIRAN, C.; KOVTYUKH, Valery V.; BELIK, Stanislav I.

doi:10.1017/S1743921310004394

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SOUBIRAN, C.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]

KOVTYUKH, Valery V.

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Communication dans un congrès

Este ítem está publicado en

Light Elements in the Universe, Light Elements in the Universe, 2010. 2010, vol. 268, p. 343-344

Resumen en inglés

Atmospheric parameters and Li abundances have been determined for 162 stars observed at high resolution, high signal to noise ratio with the ELODIE echelle spectrograph (OHP, France). Among them, about 70 stars are active stars with a large fraction of BY Dra type stars. For all stars, rotational velocities were obtained with a calibration of the cross-correlation function, effective temperatures by the line depth ratio method, surface gravities by the parallaxe method and by the ionization balance of iron. The frequency of stars with observed lithium is significantly higher in active stars than in non active stars. Among active stars, no clear correlation has been found between different indicators of activity for our sample stars, but some correlation of an index R′H K and vsini is observed.< Leer menos

Palabras clave en inglés

Stars: abundances

fundamental parameters

activity

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Li abundances and chromospheric activity of BY Dra type stars

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Este ítem está publicado en

Resumen en inglés

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DOI

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Centros de investigación