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

Jasniewicz, G.; Recio-Blanco, A.; Laverny, P. de; Parthasarathy, M.; Medeiros, José Renan de

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	Laverny, P. de
dc.contributor.author	Parthasarathy, M.
dc.contributor.author	Medeiros, José Renan de
dc.date.accessioned	2020-04-23T11:47:20Z
dc.date.available	2020-04-23T11:47:20Z
dc.date.issued	2006
dc.description.resumo	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. 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 > 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.	pt_BR
dc.identifier.citation	MEDEIROS, José Renan de; JASNIEWICZ, G.; LEVERNY, P.; RECIO-BLANCO, A.; PARTHASARATHY, M. Lithium abundances for early F stars: new observational constraints for the Li dilution. Astronomy & Astrophysics (Berlin), França, v. 453, n.2, p. 717-721, 2006. ISSN 1432-0746 versão online. DOI https://doi.org/10.1051/0004-6361:20054421. Disponível em: https://www.aanda.org/articles/aa/abs/2006/26/aa4421-05/aa4421-05.html . Acesso em: 23 abr. 2020.	pt_BR
dc.identifier.doi	https://doi.org/10.1051/0004-6361:20054421
dc.identifier.issn	0004-6361 (print), 1432-0746 (online)
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/28827
dc.language	en	pt_BR
dc.publisher	Astronomy & Astrophysics	pt_BR
dc.subject	Stars: evolution	pt_BR
dc.subject	Stars: late-type	pt_BR
dc.subject	Stars: fundamental parameters	pt_BR
dc.subject	Stars: abundances	pt_BR
dc.title	Lithium abundances for early F stars: new observational constraints for the Li dilution	pt_BR
dc.type	article	pt_BR