Lithium abundances for early F stars: new observational constraints for the Li dilution
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , |
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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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 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
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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eng |
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eng |
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Astronomy & Astrophysics |
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Astronomy & Astrophysics |
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