The Li–age correlation: the Sun is unusually Li deficient for its age
| Autor(a) principal: | |
|---|---|
| Data de Publicação: | 2019 |
| Outros Autores: | , , , , , , , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Institucional da UFRGS |
| Texto Completo: | http://hdl.handle.net/10183/198766 |
Resumo: | This work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region of the asymmetric 6707.75 Å Li I line for a sample of 77 stars plus the Sun. As in previous works based on a smaller sample of solar twins, we find a strong correlation between Li depletion and stellar age. In addition, for the first time we show that the Sun has the lowest Li abundance in comparison with solar twins at similar age (4.6 ± 0.5 Gyr). We compare the lithium content with the condensation temperature slope for a subsample of the best solar twins and determine that the most lithium-depleted stars also have fewer refractory elements. We speculate whether the low lithium content in the Sun might be related to the particular configuration of our Solar system. |
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Carlos, Marília Gabriela Cardoso CorrêaMeléndez, JorgeSpina, LorenzoSantos, Leonardo Augusto Gonçalves dosBedell, MeganRamírez, IvánAsplund, MartinBean, Jacob L.Yong, DavidGalarza, Jhon Joel YanaAlves-Brito, Alan2019-09-04T02:35:09Z20190035-8711http://hdl.handle.net/10183/198766001099001This work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region of the asymmetric 6707.75 Å Li I line for a sample of 77 stars plus the Sun. As in previous works based on a smaller sample of solar twins, we find a strong correlation between Li depletion and stellar age. In addition, for the first time we show that the Sun has the lowest Li abundance in comparison with solar twins at similar age (4.6 ± 0.5 Gyr). We compare the lithium content with the condensation temperature slope for a subsample of the best solar twins and determine that the most lithium-depleted stars also have fewer refractory elements. We speculate whether the low lithium content in the Sun might be related to the particular configuration of our Solar system.application/pdfengMonthly notices of the royal astronomical society. Oxford. Vol. 485, no. 3 (May 2019), p. 4052–4059LítioEvolucao estelarSistemas planetáriosSolTechniques: spectroscopicSun: abundancesStars: abundancesStars: evolutionPlanetary systemsStars: solar-typeThe Li–age correlation: the Sun is unusually Li deficient for its ageEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001099001.pdf.txt001099001.pdf.txtExtracted Texttext/plain40882http://www.lume.ufrgs.br/bitstream/10183/198766/2/001099001.pdf.txt46b7393ff0abc95091f0c260f0f4809bMD52ORIGINAL001099001.pdfTexto completo (inglês)application/pdf726039http://www.lume.ufrgs.br/bitstream/10183/198766/1/001099001.pdf0f9105c5782ea02ffa0c35bc39070202MD5110183/1987662023-05-14 03:24:37.066496oai:www.lume.ufrgs.br:10183/198766Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-14T06:24:37Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
| dc.title.pt_BR.fl_str_mv |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| title |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| spellingShingle |
The Li–age correlation: the Sun is unusually Li deficient for its age Carlos, Marília Gabriela Cardoso Corrêa Lítio Evolucao estelar Sistemas planetários Sol Techniques: spectroscopic Sun: abundances Stars: abundances Stars: evolution Planetary systems Stars: solar-type |
| title_short |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| title_full |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| title_fullStr |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| title_full_unstemmed |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| title_sort |
The Li–age correlation: the Sun is unusually Li deficient for its age |
| author |
Carlos, Marília Gabriela Cardoso Corrêa |
| author_facet |
Carlos, Marília Gabriela Cardoso Corrêa Meléndez, Jorge Spina, Lorenzo Santos, Leonardo Augusto Gonçalves dos Bedell, Megan Ramírez, Iván Asplund, Martin Bean, Jacob L. Yong, David Galarza, Jhon Joel Yana Alves-Brito, Alan |
| author_role |
author |
| author2 |
Meléndez, Jorge Spina, Lorenzo Santos, Leonardo Augusto Gonçalves dos Bedell, Megan Ramírez, Iván Asplund, Martin Bean, Jacob L. Yong, David Galarza, Jhon Joel Yana Alves-Brito, Alan |
| author2_role |
author author author author author author author author author author |
| dc.contributor.author.fl_str_mv |
Carlos, Marília Gabriela Cardoso Corrêa Meléndez, Jorge Spina, Lorenzo Santos, Leonardo Augusto Gonçalves dos Bedell, Megan Ramírez, Iván Asplund, Martin Bean, Jacob L. Yong, David Galarza, Jhon Joel Yana Alves-Brito, Alan |
| dc.subject.por.fl_str_mv |
Lítio Evolucao estelar Sistemas planetários Sol |
| topic |
Lítio Evolucao estelar Sistemas planetários Sol Techniques: spectroscopic Sun: abundances Stars: abundances Stars: evolution Planetary systems Stars: solar-type |
| dc.subject.eng.fl_str_mv |
Techniques: spectroscopic Sun: abundances Stars: abundances Stars: evolution Planetary systems Stars: solar-type |
| description |
This work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplanets. We employ spectral synthesis in the region of the asymmetric 6707.75 Å Li I line for a sample of 77 stars plus the Sun. As in previous works based on a smaller sample of solar twins, we find a strong correlation between Li depletion and stellar age. In addition, for the first time we show that the Sun has the lowest Li abundance in comparison with solar twins at similar age (4.6 ± 0.5 Gyr). We compare the lithium content with the condensation temperature slope for a subsample of the best solar twins and determine that the most lithium-depleted stars also have fewer refractory elements. We speculate whether the low lithium content in the Sun might be related to the particular configuration of our Solar system. |
| publishDate |
2019 |
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2019-09-04T02:35:09Z |
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2019 |
| dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10183/198766 |
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0035-8711 |
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001099001 |
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0035-8711 001099001 |
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http://hdl.handle.net/10183/198766 |
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eng |
| language |
eng |
| dc.relation.ispartof.pt_BR.fl_str_mv |
Monthly notices of the royal astronomical society. Oxford. Vol. 485, no. 3 (May 2019), p. 4052–4059 |
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info:eu-repo/semantics/openAccess |
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