Spatially resolved magnetic field structure in the disk of a T Tauri star

Autores
Stephens, Ian W.; Looney, Leslie W.; Kwon, Woojin; Fernandez Lopez, Manuel; Hughes, A. Meredith; Mundy, Lee G.; Crutcher, Richard M.; Li, Zhi Yun; Rao, Ramprasad
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Magnetic fields in accretion disks play a dominant role during the star formation process but have hitherto been observationally poorly constrained. Field strengths have been inferred on T Tauri stars themselves and possibly in the innermost part of the accretion disk, but the strength and morphology of the field in the bulk of the disk have not been observed. Unresolved measurements of polarized emission (arising from elongated dust grains aligned perpendicular to the field) imply average fields aligned with the disks. Theoretically, the fields are expected to be largely toroidal, poloidal, or a mixture of the two, which imply different mechanisms for transporting angular momentum in the disks of actively accreting young stars such as HL Tau. Here we report resolved measurements of the polarized 1.25 mm continuum emission from HL Tau's disk. The magnetic field on a scale of 80 AU is coincident with the major axis (~210 AU diameter) of the disk. From this we conclude that the magnetic field inside the disk at this scale cannot be dominated by a vertical component, though a purely toroidal field does not fit the data well either. The unexpected morphology suggests that the magnetic field's role for the accretion of a T Tauri star is more complex than the current theoretical understanding.
Fil: Stephens, Ian W. . Boston University, Institute for Astrophysical Research; Estados Unidos
Fil: Looney, Leslie W. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
Fil: Kwon, Woojin . Netherlands Institute for Space Research, Groningen; Países Bajos
Fil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Hughes, A. Meredith . Wesleyan University. Van Vleck Observatory, Astronomy Department ; Estados Unidos
Fil: Mundy, Lee G. . University of Maryland. Astronomy Department & Laboratory for Millimeter-wave Astronomy; Estados Unidos
Fil: Crutcher, Richard M. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
Fil: Li, Zhi Yun. University of Virginia. Astronomy Department; Estados Unidos
Fil: Rao, Ramprasad . Academia Sinica. Institute of Astronomy and Astrophysics; Estados Unidos
Materia
Star formation
Protostellar disks
Polarization
margnetic fields
T Tauri stars
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/7230

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network_name_str CONICET Digital (CONICET)
spelling Spatially resolved magnetic field structure in the disk of a T Tauri starStephens, Ian W. Looney, Leslie W. Kwon, Woojin Fernandez Lopez, ManuelHughes, A. Meredith Mundy, Lee G. Crutcher, Richard M. Li, Zhi YunRao, Ramprasad Star formationProtostellar disksPolarizationmargnetic fieldsT Tauri starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Magnetic fields in accretion disks play a dominant role during the star formation process but have hitherto been observationally poorly constrained. Field strengths have been inferred on T Tauri stars themselves and possibly in the innermost part of the accretion disk, but the strength and morphology of the field in the bulk of the disk have not been observed. Unresolved measurements of polarized emission (arising from elongated dust grains aligned perpendicular to the field) imply average fields aligned with the disks. Theoretically, the fields are expected to be largely toroidal, poloidal, or a mixture of the two, which imply different mechanisms for transporting angular momentum in the disks of actively accreting young stars such as HL Tau. Here we report resolved measurements of the polarized 1.25 mm continuum emission from HL Tau's disk. The magnetic field on a scale of 80 AU is coincident with the major axis (~210 AU diameter) of the disk. From this we conclude that the magnetic field inside the disk at this scale cannot be dominated by a vertical component, though a purely toroidal field does not fit the data well either. The unexpected morphology suggests that the magnetic field's role for the accretion of a T Tauri star is more complex than the current theoretical understanding.Fil: Stephens, Ian W. . Boston University, Institute for Astrophysical Research; Estados UnidosFil: Looney, Leslie W. . University of Illinois, Urbana. Department of Astronomy; Estados UnidosFil: Kwon, Woojin . Netherlands Institute for Space Research, Groningen; Países BajosFil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); ArgentinaFil: Hughes, A. Meredith . Wesleyan University. Van Vleck Observatory, Astronomy Department ; Estados UnidosFil: Mundy, Lee G. . University of Maryland. Astronomy Department & Laboratory for Millimeter-wave Astronomy; Estados UnidosFil: Crutcher, Richard M. . University of Illinois, Urbana. Department of Astronomy; Estados UnidosFil: Li, Zhi Yun. University of Virginia. Astronomy Department; Estados UnidosFil: Rao, Ramprasad . Academia Sinica. Institute of Astronomy and Astrophysics; Estados UnidosNature Publishing Group2014-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7230Stephens, Ian W. ; Looney, Leslie W. ; Kwon, Woojin ; Fernandez Lopez, Manuel; Hughes, A. Meredith ; et al.; Spatially resolved magnetic field structure in the disk of a T Tauri star; Nature Publishing Group; Nature; 154; 7524; 10-2014; 597–5990028-0836enginfo:eu-repo/semantics/altIdentifier/arxiv/http://arxiv.org/abs/1409.2878info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/nature/journal/v514/n7524/full/nature13850.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1038/nature13850info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:49Zoai:ri.conicet.gov.ar:11336/7230instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:33:49.99CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spatially resolved magnetic field structure in the disk of a T Tauri star
title Spatially resolved magnetic field structure in the disk of a T Tauri star
spellingShingle Spatially resolved magnetic field structure in the disk of a T Tauri star
Stephens, Ian W.
Star formation
Protostellar disks
Polarization
margnetic fields
T Tauri stars
title_short Spatially resolved magnetic field structure in the disk of a T Tauri star
title_full Spatially resolved magnetic field structure in the disk of a T Tauri star
title_fullStr Spatially resolved magnetic field structure in the disk of a T Tauri star
title_full_unstemmed Spatially resolved magnetic field structure in the disk of a T Tauri star
title_sort Spatially resolved magnetic field structure in the disk of a T Tauri star
dc.creator.none.fl_str_mv Stephens, Ian W.
Looney, Leslie W.
Kwon, Woojin
Fernandez Lopez, Manuel
Hughes, A. Meredith
Mundy, Lee G.
Crutcher, Richard M.
Li, Zhi Yun
Rao, Ramprasad
author Stephens, Ian W.
author_facet Stephens, Ian W.
Looney, Leslie W.
Kwon, Woojin
Fernandez Lopez, Manuel
Hughes, A. Meredith
Mundy, Lee G.
Crutcher, Richard M.
Li, Zhi Yun
Rao, Ramprasad
author_role author
author2 Looney, Leslie W.
Kwon, Woojin
Fernandez Lopez, Manuel
Hughes, A. Meredith
Mundy, Lee G.
Crutcher, Richard M.
Li, Zhi Yun
Rao, Ramprasad
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Star formation
Protostellar disks
Polarization
margnetic fields
T Tauri stars
topic Star formation
Protostellar disks
Polarization
margnetic fields
T Tauri stars
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Magnetic fields in accretion disks play a dominant role during the star formation process but have hitherto been observationally poorly constrained. Field strengths have been inferred on T Tauri stars themselves and possibly in the innermost part of the accretion disk, but the strength and morphology of the field in the bulk of the disk have not been observed. Unresolved measurements of polarized emission (arising from elongated dust grains aligned perpendicular to the field) imply average fields aligned with the disks. Theoretically, the fields are expected to be largely toroidal, poloidal, or a mixture of the two, which imply different mechanisms for transporting angular momentum in the disks of actively accreting young stars such as HL Tau. Here we report resolved measurements of the polarized 1.25 mm continuum emission from HL Tau's disk. The magnetic field on a scale of 80 AU is coincident with the major axis (~210 AU diameter) of the disk. From this we conclude that the magnetic field inside the disk at this scale cannot be dominated by a vertical component, though a purely toroidal field does not fit the data well either. The unexpected morphology suggests that the magnetic field's role for the accretion of a T Tauri star is more complex than the current theoretical understanding.
Fil: Stephens, Ian W. . Boston University, Institute for Astrophysical Research; Estados Unidos
Fil: Looney, Leslie W. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
Fil: Kwon, Woojin . Netherlands Institute for Space Research, Groningen; Países Bajos
Fil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Hughes, A. Meredith . Wesleyan University. Van Vleck Observatory, Astronomy Department ; Estados Unidos
Fil: Mundy, Lee G. . University of Maryland. Astronomy Department & Laboratory for Millimeter-wave Astronomy; Estados Unidos
Fil: Crutcher, Richard M. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
Fil: Li, Zhi Yun. University of Virginia. Astronomy Department; Estados Unidos
Fil: Rao, Ramprasad . Academia Sinica. Institute of Astronomy and Astrophysics; Estados Unidos
description Magnetic fields in accretion disks play a dominant role during the star formation process but have hitherto been observationally poorly constrained. Field strengths have been inferred on T Tauri stars themselves and possibly in the innermost part of the accretion disk, but the strength and morphology of the field in the bulk of the disk have not been observed. Unresolved measurements of polarized emission (arising from elongated dust grains aligned perpendicular to the field) imply average fields aligned with the disks. Theoretically, the fields are expected to be largely toroidal, poloidal, or a mixture of the two, which imply different mechanisms for transporting angular momentum in the disks of actively accreting young stars such as HL Tau. Here we report resolved measurements of the polarized 1.25 mm continuum emission from HL Tau's disk. The magnetic field on a scale of 80 AU is coincident with the major axis (~210 AU diameter) of the disk. From this we conclude that the magnetic field inside the disk at this scale cannot be dominated by a vertical component, though a purely toroidal field does not fit the data well either. The unexpected morphology suggests that the magnetic field's role for the accretion of a T Tauri star is more complex than the current theoretical understanding.
publishDate 2014
dc.date.none.fl_str_mv 2014-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/7230
Stephens, Ian W. ; Looney, Leslie W. ; Kwon, Woojin ; Fernandez Lopez, Manuel; Hughes, A. Meredith ; et al.; Spatially resolved magnetic field structure in the disk of a T Tauri star; Nature Publishing Group; Nature; 154; 7524; 10-2014; 597–599
0028-0836
url http://hdl.handle.net/11336/7230
identifier_str_mv Stephens, Ian W. ; Looney, Leslie W. ; Kwon, Woojin ; Fernandez Lopez, Manuel; Hughes, A. Meredith ; et al.; Spatially resolved magnetic field structure in the disk of a T Tauri star; Nature Publishing Group; Nature; 154; 7524; 10-2014; 597–599
0028-0836
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/arxiv/http://arxiv.org/abs/1409.2878
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/nature/journal/v514/n7524/full/nature13850.html
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature13850
info:eu-repo/semantics/altIdentifier/doi/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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