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dc.contributor.author
Stephens, Ian W.
dc.contributor.author
Looney, Leslie W.
dc.contributor.author
Kwon, Woojin
dc.contributor.author
Fernandez Lopez, Manuel
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dc.contributor.author
Hughes, A. Meredith
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Mundy, Lee G.
dc.contributor.author
Crutcher, Richard M.
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Li, Zhi Yun
dc.contributor.author
Rao, Ramprasad
dc.date.available
2016-08-18T13:53:23Z
dc.date.issued
2014-10
dc.identifier.citation
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
dc.identifier.issn
0028-0836
dc.identifier.uri
http://hdl.handle.net/11336/7230
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Nature Publishing Group
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Star Formation
dc.subject
Protostellar Disks
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Polarization
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Margnetic Fields
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T Tauri Stars
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Spatially resolved magnetic field structure in the disk of a T Tauri star
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-07-26T15:12:34Z
dc.journal.volume
154
dc.journal.number
7524
dc.journal.pagination
597–599
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Stephens, Ian W. . Boston University, Institute for Astrophysical Research; Estados Unidos
dc.description.fil
Fil: Looney, Leslie W. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
dc.description.fil
Fil: Kwon, Woojin . Netherlands Institute for Space Research, Groningen; Países Bajos
dc.description.fil
Fil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto Argentino de Radioastronomia (i); Argentina
dc.description.fil
Fil: Hughes, A. Meredith . Wesleyan University. Van Vleck Observatory, Astronomy Department ; Estados Unidos
dc.description.fil
Fil: Mundy, Lee G. . University of Maryland. Astronomy Department & Laboratory for Millimeter-wave Astronomy; Estados Unidos
dc.description.fil
Fil: Crutcher, Richard M. . University of Illinois, Urbana. Department of Astronomy; Estados Unidos
dc.description.fil
Fil: Li, Zhi Yun. University of Virginia. Astronomy Department; Estados Unidos
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Fil: Rao, Ramprasad . Academia Sinica. Institute of Astronomy and Astrophysics; Estados Unidos
dc.journal.title
Nature
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/arxiv/http://arxiv.org/abs/1409.2878
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/nature/journal/v514/n7524/full/nature13850.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1038/nature13850
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1038/nature13850
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