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

doi:10.1017/S1743921310004394

Métadonnées

Licence d’utilisation du document

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.

Langue

Communication dans un congrès

Ce document a été publié dans

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

Résumé en anglais

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.< Réduire

Mots clés en anglais

Stars: abundances

fundamental parameters

activity

Métadonnées

Licence d’utilisation du document

Li abundances and chromospheric activity of BY Dra type stars

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

DOI

Origine

Unités de recherche