Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFMG |
Texto Completo: | https://doi.org/10.1051/0004-6361/201731629 http://hdl.handle.net/1843/56461 https://orcid.org/0000-0001-7476-7253 https://orcid.org/0000-0001-6660-936X https://orcid.org/0000-0002-5171-8376 https://orcid.org/0000-0002-7450-6712 |
Resumo: | Context: Statistical studies of the spectral signatures of jets and winds in young stars are crucial to characterize outflows and understand their impact on disk and stellar evolution. The young, open cluster NGC 2264 contains hundreds of well-characterized classical T Tauri stars (CTTS), being thus an ideal site for these statistical studies. Its slightly older age than star forming regions studied in previous works, such as Taurus, allows us to investigate outflows in a different phase of CTTS evolution. Aims: We search for correlations between the [OI]λ6300 line, a well-known tracer of jets and winds in young stars, and stellar, disk and accretion properties in NGC 2264, aiming to characterize the outflow phenomena that occur within the circumstellar environment of young stars. Methods: We analyzed FLAMES spectra of 184 stars, detecting the [OI]λ6300 line in 108 CTTSs and two Herbig AeBe stars. We identified the main features of this line: a high-velocity component (HVC), and a broad and narrow low-velocity components (BLVC and NLVC). We calculated luminosities and kinematic properties of these components, then compared them with known stellar and accretion parameters. Results: The luminosity of the [OI]λ6300 line and its components correlate positively with the stellar and accretion luminosity. The HVC is only detected among systems with optically thick inner disks; the BLVC is most common among thick disk systems and rarer among systems with anemic disks and transition disks; and the NLVC is detected among systems with all types of disks, including transition disks. Our BLVCs present blueshifts of up to 50 km s−1 and widths consistent with disk winds originating between ∼0.05 and ∼0.5 au from the central object, while the NLVCs in our sample have widths compatible with an origin between ∼0.5 and ∼5 au, in agreement with previous studies in Taurus. A comparison of [OI]λ6300 profiles with CoRoT light curves shows that the HVC is found most often among sources with irregular, aperiodic photometric variability, usually associated with CTTSs accreting in an unstable regime. No stellar properties (Teff, mass, rotation) appear to significantly influence any property of protosellar jets. We find jet velocities on average similar to those found in Taurus. Conclusions: We confirm earlier findings in Taurus which favor an inner MHD disk wind as the origin of the BLVC, while there is no conclusive evidence that the NLVC traces photoevaporative disk winds. The [OI]λ6300 line profile shows signs of evolving as the disk disperses, with the HVC and BLVC disappearing as the inner disk becomes optically thin, in support of the scenario of inside-out gas dissipation in the inner disk. |
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2023-07-17T19:11:37Z2023-07-17T19:11:37Z2018-12620https://doi.org/10.1051/0004-6361/2017316291432-0746http://hdl.handle.net/1843/56461https://orcid.org/0000-0001-7476-7253https://orcid.org/0000-0001-6660-936Xhttps://orcid.org/0000-0002-5171-8376https://orcid.org/0000-0002-7450-6712Context: Statistical studies of the spectral signatures of jets and winds in young stars are crucial to characterize outflows and understand their impact on disk and stellar evolution. The young, open cluster NGC 2264 contains hundreds of well-characterized classical T Tauri stars (CTTS), being thus an ideal site for these statistical studies. Its slightly older age than star forming regions studied in previous works, such as Taurus, allows us to investigate outflows in a different phase of CTTS evolution. Aims: We search for correlations between the [OI]λ6300 line, a well-known tracer of jets and winds in young stars, and stellar, disk and accretion properties in NGC 2264, aiming to characterize the outflow phenomena that occur within the circumstellar environment of young stars. Methods: We analyzed FLAMES spectra of 184 stars, detecting the [OI]λ6300 line in 108 CTTSs and two Herbig AeBe stars. We identified the main features of this line: a high-velocity component (HVC), and a broad and narrow low-velocity components (BLVC and NLVC). We calculated luminosities and kinematic properties of these components, then compared them with known stellar and accretion parameters. Results: The luminosity of the [OI]λ6300 line and its components correlate positively with the stellar and accretion luminosity. The HVC is only detected among systems with optically thick inner disks; the BLVC is most common among thick disk systems and rarer among systems with anemic disks and transition disks; and the NLVC is detected among systems with all types of disks, including transition disks. Our BLVCs present blueshifts of up to 50 km s−1 and widths consistent with disk winds originating between ∼0.05 and ∼0.5 au from the central object, while the NLVCs in our sample have widths compatible with an origin between ∼0.5 and ∼5 au, in agreement with previous studies in Taurus. A comparison of [OI]λ6300 profiles with CoRoT light curves shows that the HVC is found most often among sources with irregular, aperiodic photometric variability, usually associated with CTTSs accreting in an unstable regime. No stellar properties (Teff, mass, rotation) appear to significantly influence any property of protosellar jets. We find jet velocities on average similar to those found in Taurus. Conclusions: We confirm earlier findings in Taurus which favor an inner MHD disk wind as the origin of the BLVC, while there is no conclusive evidence that the NLVC traces photoevaporative disk winds. The [OI]λ6300 line profile shows signs of evolving as the disk disperses, with the HVC and BLVC disappearing as the inner disk becomes optically thin, in support of the scenario of inside-out gas dissipation in the inner disk.Contexto: Estudos estatísticos das assinaturas espectrais de jatos e ventos em estrelas jovens são cruciais para caracterizar fluxos de saída e entender seu impacto no disco e na evolução estelar. O jovem aglomerado aberto NGC 2264 contém centenas de estrelas T Tauri clássicas bem caracterizadas (CTTS), sendo, portanto, um local ideal para esses estudos estatísticos. Sua idade um pouco mais antiga do que regiões formadoras de estrelas estudadas em trabalhos anteriores, como Taurus, permite investigar escoamentos em uma fase diferente da evolução do CTTS. Objetivos: Buscamos correlações entre a linha [OI]λ6300, um conhecido traçador de jatos e ventos em estrelas jovens, e propriedades estelares, de disco e de acreção em NGC 2264, visando caracterizar os fenômenos de escoamento que ocorrem no ambiente circunstelar de jovens estrelas. Métodos: Analisamos espectros FLAMES de 184 estrelas, detectando a linha [OI]λ6300 em 108 CTTSs e duas estrelas Herbig AeBe. Identificamos as principais características dessa linha: um componente de alta velocidade (HVC) e um componente amplo e estreito de baixa velocidade (BLVC e NLVC). Calculamos as luminosidades e as propriedades cinemáticas desses componentes e depois as comparamos com parâmetros estelares e de acreção conhecidos. Resultados: A luminosidade da linha [OI]λ6300 e seus componentes correlacionam-se positivamente com a luminosidade estelar e de acreção. O HVC só é detectado entre sistemas com discos internos opticamente espessos; o BLVC é mais comum entre os sistemas de discos espessos e mais raro entre os sistemas com discos anêmicos e discos de transição; e o NLVC é detectado entre sistemas com todos os tipos de discos, incluindo discos de transição. Nossos BLVCs apresentam blueshifts de até 50 km s−1 e larguras consistentes com ventos de disco originados entre ∼0,05 e ∼0,5 au do objeto central, enquanto os NLVCs em nossa amostra têm larguras compatíveis com uma origem entre ∼0,5 e ∼5 au , de acordo com estudos anteriores em Touro. Uma comparação de perfis [OI]λ6300 com curvas de luz CoRoT mostra que o HVC é encontrado com mais frequência entre fontes com variabilidade fotométrica irregular e aperiódica, geralmente associada a acreção de CTTSs em um regime instável. Nenhuma propriedade estelar (Teff, massa, rotação) parece influenciar significativamente qualquer propriedade dos jatos protoselares. Encontramos velocidades de jato em média semelhantes às encontradas em Touro. Conclusões: Confirmamos descobertas anteriores em Taurus que favorecem um vento interno do disco MHD como a origem do BLVC, enquanto não há evidências conclusivas de que o NLVC rastreia ventos do disco fotoevaporativo. O perfil da linha [OI]λ6300 mostra sinais de evolução à medida que o disco se dispersa, com o HVC e BLVC desaparecendo à medida que o disco interno se torna opticamente fino, em suporte ao cenário de dissipação de gás de dentro para fora no disco interno.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorengUniversidade Federal de Minas GeraisUFMGBrasilICX - DEPARTAMENTO DE FÍSICAAstronomy & AstrophysicsAstrofísicaEstrelas - FormaçãoAcreção - AstrofísicaVentos estelaresAccretionAccretion disks – lineFormation – starsJets – starsPre-main sequence – starsWinds, outflowsEjection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission lineProcessos de ejeção no jovem aglomerado estelar aberto NGC 2264: um estudo da linha de emissão [OI]λ6300Åinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://www.aanda.org/articles/aa/full_html/2018/12/aa31629-17/aa31629-17.htmlPauline Telles McGinnis GuimarãesCatherine L. DougadosSilvia Helena Paixão AlencarJerome BouvierSylvie Cabritapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGORIGINALEjection processes in the young open cluster NGC 2264 a study of the [OI]λ6300Å emission line.pdfEjection processes in the young open cluster NGC 2264 a study of the [OI]λ6300Å emission line.pdfapplication/pdf5530547https://repositorio.ufmg.br/bitstream/1843/56461/2/Ejection%20processes%20in%20the%20young%20open%20cluster%20NGC%202264%20a%20study%20of%20the%20%5bOI%5d%ce%bb6300%c3%85%20emission%20line.pdfae0e5ac547dd607ffae63f6c2e6dd56aMD52LICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/56461/1/License.txtfa505098d172de0bc8864fc1287ffe22MD511843/564612023-07-17 16:11:37.497oai:repositorio.ufmg.br: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Repositório de PublicaçõesPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-07-17T19:11:37Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false |
dc.title.pt_BR.fl_str_mv |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
dc.title.alternative.pt_BR.fl_str_mv |
Processos de ejeção no jovem aglomerado estelar aberto NGC 2264: um estudo da linha de emissão [OI]λ6300Å |
title |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
spellingShingle |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line Pauline Telles McGinnis Guimarães Accretion Accretion disks – line Formation – stars Jets – stars Pre-main sequence – stars Winds, outflows Astrofísica Estrelas - Formação Acreção - Astrofísica Ventos estelares |
title_short |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
title_full |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
title_fullStr |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
title_full_unstemmed |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
title_sort |
Ejection processes in the young open cluster NGC 2264: a study of the [OI]λ6300Å emission line |
author |
Pauline Telles McGinnis Guimarães |
author_facet |
Pauline Telles McGinnis Guimarães Catherine L. Dougados Silvia Helena Paixão Alencar Jerome Bouvier Sylvie Cabrit |
author_role |
author |
author2 |
Catherine L. Dougados Silvia Helena Paixão Alencar Jerome Bouvier Sylvie Cabrit |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Pauline Telles McGinnis Guimarães Catherine L. Dougados Silvia Helena Paixão Alencar Jerome Bouvier Sylvie Cabrit |
dc.subject.por.fl_str_mv |
Accretion Accretion disks – line Formation – stars Jets – stars Pre-main sequence – stars Winds, outflows |
topic |
Accretion Accretion disks – line Formation – stars Jets – stars Pre-main sequence – stars Winds, outflows Astrofísica Estrelas - Formação Acreção - Astrofísica Ventos estelares |
dc.subject.other.pt_BR.fl_str_mv |
Astrofísica Estrelas - Formação Acreção - Astrofísica Ventos estelares |
description |
Context: Statistical studies of the spectral signatures of jets and winds in young stars are crucial to characterize outflows and understand their impact on disk and stellar evolution. The young, open cluster NGC 2264 contains hundreds of well-characterized classical T Tauri stars (CTTS), being thus an ideal site for these statistical studies. Its slightly older age than star forming regions studied in previous works, such as Taurus, allows us to investigate outflows in a different phase of CTTS evolution. Aims: We search for correlations between the [OI]λ6300 line, a well-known tracer of jets and winds in young stars, and stellar, disk and accretion properties in NGC 2264, aiming to characterize the outflow phenomena that occur within the circumstellar environment of young stars. Methods: We analyzed FLAMES spectra of 184 stars, detecting the [OI]λ6300 line in 108 CTTSs and two Herbig AeBe stars. We identified the main features of this line: a high-velocity component (HVC), and a broad and narrow low-velocity components (BLVC and NLVC). We calculated luminosities and kinematic properties of these components, then compared them with known stellar and accretion parameters. Results: The luminosity of the [OI]λ6300 line and its components correlate positively with the stellar and accretion luminosity. The HVC is only detected among systems with optically thick inner disks; the BLVC is most common among thick disk systems and rarer among systems with anemic disks and transition disks; and the NLVC is detected among systems with all types of disks, including transition disks. Our BLVCs present blueshifts of up to 50 km s−1 and widths consistent with disk winds originating between ∼0.05 and ∼0.5 au from the central object, while the NLVCs in our sample have widths compatible with an origin between ∼0.5 and ∼5 au, in agreement with previous studies in Taurus. A comparison of [OI]λ6300 profiles with CoRoT light curves shows that the HVC is found most often among sources with irregular, aperiodic photometric variability, usually associated with CTTSs accreting in an unstable regime. No stellar properties (Teff, mass, rotation) appear to significantly influence any property of protosellar jets. We find jet velocities on average similar to those found in Taurus. Conclusions: We confirm earlier findings in Taurus which favor an inner MHD disk wind as the origin of the BLVC, while there is no conclusive evidence that the NLVC traces photoevaporative disk winds. The [OI]λ6300 line profile shows signs of evolving as the disk disperses, with the HVC and BLVC disappearing as the inner disk becomes optically thin, in support of the scenario of inside-out gas dissipation in the inner disk. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018-12 |
dc.date.accessioned.fl_str_mv |
2023-07-17T19:11:37Z |
dc.date.available.fl_str_mv |
2023-07-17T19:11:37Z |
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.uri.fl_str_mv |
http://hdl.handle.net/1843/56461 |
dc.identifier.doi.pt_BR.fl_str_mv |
https://doi.org/10.1051/0004-6361/201731629 |
dc.identifier.issn.pt_BR.fl_str_mv |
1432-0746 |
dc.identifier.orcid.pt_BR.fl_str_mv |
https://orcid.org/0000-0001-7476-7253 https://orcid.org/0000-0001-6660-936X https://orcid.org/0000-0002-5171-8376 https://orcid.org/0000-0002-7450-6712 |
url |
https://doi.org/10.1051/0004-6361/201731629 http://hdl.handle.net/1843/56461 https://orcid.org/0000-0001-7476-7253 https://orcid.org/0000-0001-6660-936X https://orcid.org/0000-0002-5171-8376 https://orcid.org/0000-0002-7450-6712 |
identifier_str_mv |
1432-0746 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy & Astrophysics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Minas Gerais |
dc.publisher.initials.fl_str_mv |
UFMG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
ICX - DEPARTAMENTO DE FÍSICA |
publisher.none.fl_str_mv |
Universidade Federal de Minas Gerais |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFMG instname:Universidade Federal de Minas Gerais (UFMG) instacron:UFMG |
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Universidade Federal de Minas Gerais (UFMG) |
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UFMG |
institution |
UFMG |
reponame_str |
Repositório Institucional da UFMG |
collection |
Repositório Institucional da UFMG |
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