Solar twins in M 67: evolutionary status and lithium abundance

Aims. We determine the age and mass of the three best solar twin candidates in open cluster M 67 through lithium evolutionary models. Methods. We computed a grid of evolutionary models with non-standard mixing at metallicity [Fe/H] = 0.01 with the ToulouseGeneva evolution code for a range of stellar...

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Principais autores:	Castro, M., Nascimento Jr., J. D. do, Biazzo, K., Meléndez, J., Medeiros, José Renan de
Formato:	article
Idioma:	English
Publicado em:	Astronomy & Astrophysics
Assuntos:	Stars: fundamental parameters Stars: abundances Stars: evolution Stars: interiors Stars: solar-type
Endereço do item:	https://repositorio.ufrn.br/jspui/handle/123456789/29001 https://doi.org/10.1051/0004-6361/201015034
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id	ri-123456789-29001
record_format	dspace
spelling	ri-123456789-290012020-05-24T09:21:07Z Solar twins in M 67: evolutionary status and lithium abundance Castro, M. Nascimento Jr., J. D. do Biazzo, K. Meléndez, J. Medeiros, José Renan de Stars: fundamental parameters Stars: abundances Stars: evolution Stars: interiors Stars: solar-type Aims. We determine the age and mass of the three best solar twin candidates in open cluster M 67 through lithium evolutionary models. Methods. We computed a grid of evolutionary models with non-standard mixing at metallicity [Fe/H] = 0.01 with the ToulouseGeneva evolution code for a range of stellar masses. We estimated the mass and age of 10 solar analogs belonging to the open cluster M 67. We made a detailed study of the three solar twins of the sample, YPB637, YPB1194, and YPB1787. Results. We obtained a very accurate estimation of the mass of our solar analogs in M 67 by interpolating in the grid of evolutionary models. The three solar twins allowed us to estimate the age of the open cluster, which is 3.87+0.55 −0.66 Gyr, which is better constrained than former estimates. Conclusions. Our results show that the 3 solar twin candidates have one solar mass within the errors and that M 67 has a solar age within the errors, validating its use as a solar proxy. M 67 is an important cluster when searching for solar twins. 2020-05-18T18:56:59Z 2020-05-18T18:56:59Z 2011 article MEDEIROS, José Renan de et al. Solar twins in M?67: evolutionary status and lithium abundance. Astronomy & Astrophysics (Berlin. Print), v. 526, p. A17, 2011. ISSN 1432-0746 versão online. DOI https://doi.org/10.1051/0004-6361/201015034. Disponível em: https://www.aanda.org/articles/aa/abs/2011/02/aa15034-10/aa15034-10.html. Acesso em: 18 maio 2020. Reproduzido com permissão da Astronomy & Astrophysics, © ESO. 0004-6361 (print), 1432-0746 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29001 https://doi.org/10.1051/0004-6361/201015034 en application/pdf Astronomy & Astrophysics
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Stars: fundamental parameters Stars: abundances Stars: evolution Stars: interiors Stars: solar-type
spellingShingle	Stars: fundamental parameters Stars: abundances Stars: evolution Stars: interiors Stars: solar-type Castro, M. Nascimento Jr., J. D. do Biazzo, K. Meléndez, J. Medeiros, José Renan de Solar twins in M 67: evolutionary status and lithium abundance
description	Aims. We determine the age and mass of the three best solar twin candidates in open cluster M 67 through lithium evolutionary models. Methods. We computed a grid of evolutionary models with non-standard mixing at metallicity [Fe/H] = 0.01 with the ToulouseGeneva evolution code for a range of stellar masses. We estimated the mass and age of 10 solar analogs belonging to the open cluster M 67. We made a detailed study of the three solar twins of the sample, YPB637, YPB1194, and YPB1787. Results. We obtained a very accurate estimation of the mass of our solar analogs in M 67 by interpolating in the grid of evolutionary models. The three solar twins allowed us to estimate the age of the open cluster, which is 3.87+0.55 −0.66 Gyr, which is better constrained than former estimates. Conclusions. Our results show that the 3 solar twin candidates have one solar mass within the errors and that M 67 has a solar age within the errors, validating its use as a solar proxy. M 67 is an important cluster when searching for solar twins.
format	article
author	Castro, M. Nascimento Jr., J. D. do Biazzo, K. Meléndez, J. Medeiros, José Renan de
author_facet	Castro, M. Nascimento Jr., J. D. do Biazzo, K. Meléndez, J. Medeiros, José Renan de
author_sort	Castro, M.
title	Solar twins in M 67: evolutionary status and lithium abundance
title_short	Solar twins in M 67: evolutionary status and lithium abundance
title_full	Solar twins in M 67: evolutionary status and lithium abundance
title_fullStr	Solar twins in M 67: evolutionary status and lithium abundance
title_full_unstemmed	Solar twins in M 67: evolutionary status and lithium abundance
title_sort	solar twins in m 67: evolutionary status and lithium abundance
publisher	Astronomy & Astrophysics
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29001 https://doi.org/10.1051/0004-6361/201015034
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Solar twins in M 67: evolutionary status and lithium abundance

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