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Li abundance in young PMS associations: AB Dor

Published online by Cambridge University Press:  23 December 2005

Bruno V. Castilho ,
C.A.O. Torres ,
G. Quast ,
M.J. Sartori ,
L. da Silva  and
R. de la Reza
Bruno V. Castilho
Affiliation:
Laboratório Nacional de Astrofísica Rua Estados Unidos 154, Itajubá, MG, 37504-364, Brasil. email: [email protected]
C.A.O. Torres
Affiliation:
Laboratório Nacional de Astrofísica Rua Estados Unidos 154, Itajubá, MG, 37504-364, Brasil. email: [email protected]
G. Quast
Affiliation:
Laboratório Nacional de Astrofísica Rua Estados Unidos 154, Itajubá, MG, 37504-364, Brasil. email: [email protected]
M.J. Sartori
Affiliation:
Laboratório Nacional de Astrofísica Rua Estados Unidos 154, Itajubá, MG, 37504-364, Brasil. email: [email protected]
L. da Silva
Affiliation:
Observatório Nacional Rua José Cristino 77, Rio de Janeiro, RJ, 20921-400, Brasil
R. de la Reza
Affiliation:
Observatório Nacional Rua José Cristino 77, Rio de Janeiro, RJ, 20921-400, Brasil
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Abstract

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We present stellar parameters, Li abundances for 21 stars of the young ($\sim$50 Myears) AB Dor association, based on high-resolution spectra obtained with FEROS at the ESO 1.52m telescope, the Coudé Spectrograph at the OPD 1.6m telescope. These results are part of an ongoing project for the determination of stellar parameters, abundances for a large sample of T Tauri, post-T Tauri stars in PMS associations identified on the Search for Associations Containing Young Stars survey. The sample consists of G, K, M stars counterparts of ROSAT bright sources.

Since we expect Li depletion for the K, M stars, but small Li depletion for the G stars, we can compare the upper values of Li abundances for these stars with the one of the Galactic disk interstellar mean, at the same time provide constrains for the study of Li depletion on a chemically homogeneous high metallicity sample.

Keywords

Astrochemistrystars: abundancesstars: pre–main-sequencestars: atmospheres
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 83 - 84
Copyright
© 2005 International Astronomical Union