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

Detalhes bibliográficos
Autor(a) principal: Jasniewicz, G.
Data de Publicação: 2006
Outros Autores: Recio-Blanco, A., Laverny, P. de, Parthasarathy, M., Medeiros, José Renan de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/28827
https://doi.org/10.1051/0004-6361:20054421
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.
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spelling Jasniewicz, G.Recio-Blanco, A.Laverny, P. deParthasarathy, M.Medeiros, José Renan de2020-04-23T11:47:20Z2020-04-23T11:47:20Z2006MEDEIROS, 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. 2020.0004-6361 (print), 1432-0746 (online)https://repositorio.ufrn.br/jspui/handle/123456789/28827https://doi.org/10.1051/0004-6361:20054421Astronomy & AstrophysicsStars: evolutionStars: late-typeStars: fundamental parametersStars: abundancesLithium abundances for early F stars: new observational constraints for the Li dilutioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleAims. 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.engreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessORIGINALLithiumAbundancesForEarlyFStars_Medeiros_2006.pdfLithiumAbundancesForEarlyFStars_Medeiros_2006.pdfapplication/pdf285274https://repositorio.ufrn.br/bitstream/123456789/28827/1/LithiumAbundancesForEarlyFStars_Medeiros_2006.pdf202430bdf99243bf5261c0edf0c3401eMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/28827/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52TEXTLithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.txtLithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.txtExtracted texttext/plain32087https://repositorio.ufrn.br/bitstream/123456789/28827/3/LithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.txt0bec63a025336046218bd98c67b12764MD53THUMBNAILLithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.jpgLithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.jpgGenerated Thumbnailimage/jpeg1756https://repositorio.ufrn.br/bitstream/123456789/28827/4/LithiumAbundancesForEarlyFStars_Medeiros_2006.pdf.jpg97b119f7a54d34b31e504b0a9fec5e05MD54123456789/288272020-04-26 04:30:25.244oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-04-26T07:30:25Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Lithium abundances for early F stars: new observational constraints for the Li dilution
title Lithium abundances for early F stars: new observational constraints for the Li dilution
spellingShingle Lithium abundances for early F stars: new observational constraints for the Li dilution
Jasniewicz, G.
Stars: evolution
Stars: late-type
Stars: fundamental parameters
Stars: abundances
title_short Lithium abundances for early F stars: new observational constraints for the Li dilution
title_full Lithium abundances for early F stars: new observational constraints for the Li dilution
title_fullStr Lithium abundances for early F stars: new observational constraints for the Li dilution
title_full_unstemmed Lithium abundances for early F stars: new observational constraints for the Li dilution
title_sort Lithium abundances for early F stars: new observational constraints for the Li dilution
author Jasniewicz, G.
author_facet Jasniewicz, G.
Recio-Blanco, A.
Laverny, P. de
Parthasarathy, M.
Medeiros, José Renan de
author_role author
author2 Recio-Blanco, A.
Laverny, P. de
Parthasarathy, M.
Medeiros, José Renan de
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Jasniewicz, G.
Recio-Blanco, A.
Laverny, P. de
Parthasarathy, M.
Medeiros, José Renan de
dc.subject.por.fl_str_mv Stars: evolution
Stars: late-type
Stars: fundamental parameters
Stars: abundances
topic Stars: evolution
Stars: late-type
Stars: fundamental parameters
Stars: abundances
description 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.
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2020-04-23T11:47:20Z
dc.date.available.fl_str_mv 2020-04-23T11:47:20Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.citation.fl_str_mv 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.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/28827
dc.identifier.issn.none.fl_str_mv 0004-6361 (print), 1432-0746 (online)
dc.identifier.doi.none.fl_str_mv https://doi.org/10.1051/0004-6361:20054421
identifier_str_mv 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.
0004-6361 (print), 1432-0746 (online)
url https://repositorio.ufrn.br/jspui/handle/123456789/28827
https://doi.org/10.1051/0004-6361:20054421
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publisher.none.fl_str_mv Astronomy & Astrophysics
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