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Lithium abundances for early F stars: new observational constraints for the Li dilution

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dc.contributor.author Jasniewicz, G
dc.contributor.author Recio-Blanco, A
dc.contributor.author de Laverny, P
dc.contributor.author Parthasarathy, M
dc.contributor.author De Medeiros, J. R
dc.date.accessioned 2007-06-27T09:36:32Z
dc.date.available 2007-06-27T09:36:32Z
dc.date.issued 2006-07
dc.identifier.citation A&A, Vol, 453, pp. 717-722 en
dc.identifier.uri http://hdl.handle.net/2248/1690
dc.description.abstract Aims.To investigate any correlation between Li abundances and rotational velocities among F-G evolved stars, we study a large sample of early F stars from the Bright Star Catalogue (BSC), most of them classified in the literature as giant stars. Methods.Physical parameters and Li abundances are estimated for each star, often for the first time, by comparing observed and synthetic spectra. We analyse the position of the stars in the H-R Diagram based on Hipparcos data using stellar evolutionary tracks and we discuss their Li abundances and projected rotational velocities. Results.Observed stars are mostly on the turnoff, with masses between 1.5 and $2.0~M_{\odot}$. The stars with measured A(Li) abundance show high Li content, most of them with abundance near the cosmic value. The A(Li) versus $V\sin i$ diagram shows the same trend as reported in previous studies: fast rotators ( $V\sin i\gse 30$ km s-1) are also stars with high Li content, whereas slow rotators present a wide range of values of A(Li), ranging from no detected Li to the cosmic value. en
dc.format.extent 198966 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher EDP Sciences en
dc.relation.uri http://dx.doi.org/10.1051/0004-6361:20054421 en
dc.subject stars: evolution -- stars en
dc.subject late-type -- stars en
dc.subject fundamental parameters -- stars en
dc.title Lithium abundances for early F stars: new observational constraints for the Li dilution en
dc.type Article en

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