1.3 mm Polarized emission in the circumstellar disk of a massive protostar
- Autores
- Fernandez Lopez, Manuel; Stephens, I. W.; Girart, J. M.; Looney, L.; Curiel, S.; Segura Cox, D.; Eswaraiah, C.; Lai, S. P.
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present the first resolved observations of the 1.3 mm polarized emission from the disk-like structure surrounding the high-mass protostar Cepheus A HW2. These CARMA data partially resolve the dust polarization, suggesting a uniform morphology of polarization vectors with an average position angle of 57° ± 6° and an average polarization fraction of 2.0% ± 0.4%. The distribution of the polarization vectors can be attributed to (1) the direct emission of magnetically aligned grains of dust by a uniform magnetic field, or (2) the pattern produced by the scattering of an inclined disk. We show that both models can explain the observations, and perhaps a combination of the two mechanisms produces the polarized emission. A third model including a toroidal magnetic field does not match the observations. Assuming scattering is the polarization mechanism, these observations suggest that during the first few 104 years of high-mass star formation, grain sizes can grow from1 mm to several 10s μm.
Fil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina
Fil: Stephens, I. W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Boston University; Estados Unidos. University of Illinois; Estados Unidos
Fil: Girart, J. M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Institut de Ciències de l’Espai; España
Fil: Looney, L.. University of Illinois; Estados Unidos
Fil: Curiel, S.. Universidad Nacional Autónoma de México; México
Fil: Segura Cox, D.. University of Illinois; Estados Unidos
Fil: Eswaraiah, C.. National Tsing Hua University; República de China
Fil: Lai, S. P.. National Tsing Hua University; República de China - Materia
-
CEPHEUS A HW2
Magnetic fields
Polarization
Formation of stars
Polarimetry
Interstellar medium - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/26070
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1.3 mm Polarized emission in the circumstellar disk of a massive protostarFernandez Lopez, ManuelStephens, I. W.Girart, J. M.Looney, L.Curiel, S.Segura Cox, D.Eswaraiah, C.Lai, S. P.CEPHEUS A HW2Magnetic fieldsPolarizationFormation of starsPolarimetryInterstellar mediumhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present the first resolved observations of the 1.3 mm polarized emission from the disk-like structure surrounding the high-mass protostar Cepheus A HW2. These CARMA data partially resolve the dust polarization, suggesting a uniform morphology of polarization vectors with an average position angle of 57° ± 6° and an average polarization fraction of 2.0% ± 0.4%. The distribution of the polarization vectors can be attributed to (1) the direct emission of magnetically aligned grains of dust by a uniform magnetic field, or (2) the pattern produced by the scattering of an inclined disk. We show that both models can explain the observations, and perhaps a combination of the two mechanisms produces the polarized emission. A third model including a toroidal magnetic field does not match the observations. Assuming scattering is the polarization mechanism, these observations suggest that during the first few 104 years of high-mass star formation, grain sizes can grow from1 mm to several 10s μm.Fil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; ArgentinaFil: Stephens, I. W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Boston University; Estados Unidos. University of Illinois; Estados UnidosFil: Girart, J. M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Institut de Ciències de l’Espai; EspañaFil: Looney, L.. University of Illinois; Estados UnidosFil: Curiel, S.. Universidad Nacional Autónoma de México; MéxicoFil: Segura Cox, D.. University of Illinois; Estados UnidosFil: Eswaraiah, C.. National Tsing Hua University; República de ChinaFil: Lai, S. P.. National Tsing Hua University; República de ChinaIOP Publishing2016-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/26070Fernandez Lopez, Manuel; Stephens, I. W.; Girart, J. M.; Looney, L.; Curiel, S.; et al.; 1.3 mm Polarized emission in the circumstellar disk of a massive protostar; IOP Publishing; Astrophysical Journal; 832; 2; 12-2016; 1-90004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/832/2/200info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/0004-637X/832/2/200/metainfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:00:00Zoai:ri.conicet.gov.ar:11336/26070instacron: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 10:00:00.462CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
title |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
spellingShingle |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar Fernandez Lopez, Manuel CEPHEUS A HW2 Magnetic fields Polarization Formation of stars Polarimetry Interstellar medium |
title_short |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
title_full |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
title_fullStr |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
title_full_unstemmed |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
title_sort |
1.3 mm Polarized emission in the circumstellar disk of a massive protostar |
dc.creator.none.fl_str_mv |
Fernandez Lopez, Manuel Stephens, I. W. Girart, J. M. Looney, L. Curiel, S. Segura Cox, D. Eswaraiah, C. Lai, S. P. |
author |
Fernandez Lopez, Manuel |
author_facet |
Fernandez Lopez, Manuel Stephens, I. W. Girart, J. M. Looney, L. Curiel, S. Segura Cox, D. Eswaraiah, C. Lai, S. P. |
author_role |
author |
author2 |
Stephens, I. W. Girart, J. M. Looney, L. Curiel, S. Segura Cox, D. Eswaraiah, C. Lai, S. P. |
author2_role |
author author author author author author author |
dc.subject.none.fl_str_mv |
CEPHEUS A HW2 Magnetic fields Polarization Formation of stars Polarimetry Interstellar medium |
topic |
CEPHEUS A HW2 Magnetic fields Polarization Formation of stars Polarimetry Interstellar medium |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We present the first resolved observations of the 1.3 mm polarized emission from the disk-like structure surrounding the high-mass protostar Cepheus A HW2. These CARMA data partially resolve the dust polarization, suggesting a uniform morphology of polarization vectors with an average position angle of 57° ± 6° and an average polarization fraction of 2.0% ± 0.4%. The distribution of the polarization vectors can be attributed to (1) the direct emission of magnetically aligned grains of dust by a uniform magnetic field, or (2) the pattern produced by the scattering of an inclined disk. We show that both models can explain the observations, and perhaps a combination of the two mechanisms produces the polarized emission. A third model including a toroidal magnetic field does not match the observations. Assuming scattering is the polarization mechanism, these observations suggest that during the first few 104 years of high-mass star formation, grain sizes can grow from1 mm to several 10s μm. Fil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina Fil: Stephens, I. W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Boston University; Estados Unidos. University of Illinois; Estados Unidos Fil: Girart, J. M.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos. Institut de Ciències de l’Espai; España Fil: Looney, L.. University of Illinois; Estados Unidos Fil: Curiel, S.. Universidad Nacional Autónoma de México; México Fil: Segura Cox, D.. University of Illinois; Estados Unidos Fil: Eswaraiah, C.. National Tsing Hua University; República de China Fil: Lai, S. P.. National Tsing Hua University; República de China |
description |
We present the first resolved observations of the 1.3 mm polarized emission from the disk-like structure surrounding the high-mass protostar Cepheus A HW2. These CARMA data partially resolve the dust polarization, suggesting a uniform morphology of polarization vectors with an average position angle of 57° ± 6° and an average polarization fraction of 2.0% ± 0.4%. The distribution of the polarization vectors can be attributed to (1) the direct emission of magnetically aligned grains of dust by a uniform magnetic field, or (2) the pattern produced by the scattering of an inclined disk. We show that both models can explain the observations, and perhaps a combination of the two mechanisms produces the polarized emission. A third model including a toroidal magnetic field does not match the observations. Assuming scattering is the polarization mechanism, these observations suggest that during the first few 104 years of high-mass star formation, grain sizes can grow from1 mm to several 10s μm. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12 |
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/11336/26070 Fernandez Lopez, Manuel; Stephens, I. W.; Girart, J. M.; Looney, L.; Curiel, S.; et al.; 1.3 mm Polarized emission in the circumstellar disk of a massive protostar; IOP Publishing; Astrophysical Journal; 832; 2; 12-2016; 1-9 0004-637X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/26070 |
identifier_str_mv |
Fernandez Lopez, Manuel; Stephens, I. W.; Girart, J. M.; Looney, L.; Curiel, S.; et al.; 1.3 mm Polarized emission in the circumstellar disk of a massive protostar; IOP Publishing; Astrophysical Journal; 832; 2; 12-2016; 1-9 0004-637X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.3847/0004-637X/832/2/200 info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/0004-637X/832/2/200/meta |
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 |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
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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1844613776370827264 |
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13.070432 |