ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527

Autores
Harris, Robert J.; Cox, Erin G.; Looney, Leslie W.; Li, Zhi-Yun; Yang, Haifeng; Fernandez Lopez, Manuel; Kwon, Woojin; Sadavoy, Sarah; Segura Cox, Dominique; Stephens, Ian; Tobin, John
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present high-sensitivity (σ I ∼ 0.2-0.5 mJy, σ QU ∼ 0.05 mJy), high-resolution (∼0.″12 -0.″2) observations of polarized 872 μm dust emission from the young multiple system VLA 1623 in ρ Ophiuchus and the protostar L1527 in Taurus. We detect the circumstellar material of VLA 1623A, the extended Keplerian disk surrounding VLA 1623A that we call VLA 1623CBdisk, VLA 1623B, VLA 1623W, and L1527 strongly in the polarized emission, at the ∼1%-3% level. We spatially resolve VLA 1623A into two sources, VLA 1623Aa and VLA 1623Ab, separated by ∼30 au and located within a cavity of radius ∼50 au within the circumbinary Keplerian disk, as well as the edge-on disk of VLA 1623W. The polarization angle of the emission is uniform across each protostellar source and nearly coincides with each disk's minor axis. The offsets between the minor axis position angle and the polarization angle are not uniformly distributed at the P ≲ 2 ×10-4 level. The circumbinary disk surrounding VLA 1623Aab is azimuthally symmetrically polarized. Each compact source's emission is partially optically thick (τ 1) at 872 μm, complicating interpretations of polarization involving aligned grains. We find evidence against alignment by radiative flux in each source, particularly in the edge-on VLA 1623W and L1527. We detect astrometric offsets between the polarized emission and the total intensity in VLA 1623Aa, VLA 1623Ab, and VLA 1623B, as predicted if self-scattering in the optically thick limit operates. We conclude that self-scattering is likely responsible for disk-scale polarization at 872 μm in these systems.
Fil: Harris, Robert J.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Cox, Erin G.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Looney, Leslie W.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Li, Zhi-Yun. University of Virginia; Estados Unidos
Fil: Yang, Haifeng. University of Virginia; Estados Unidos
Fil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Kwon, Woojin. Korea Astronomy And Space Science Institute; Corea del Sur
Fil: Sadavoy, Sarah. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Segura Cox, Dominique. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Stephens, Ian. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Tobin, John. Oklahoma State University; Estados Unidos. Leiden University; Países Bajos
Materia
CIRCUMSTELLAR MATTER
SCATTERING
STARS: FORMATION
STARS: MAGNETIC FIELD
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:11336/82424
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/82424
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527Harris, Robert J.Cox, Erin G.Looney, Leslie W.Li, Zhi-YunYang, HaifengFernandez Lopez, ManuelKwon, WoojinSadavoy, SarahSegura Cox, DominiqueStephens, IanTobin, JohnCIRCUMSTELLAR MATTERSCATTERINGSTARS: FORMATIONSTARS: MAGNETIC FIELDhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present high-sensitivity (σ I ∼ 0.2-0.5 mJy, σ QU ∼ 0.05 mJy), high-resolution (∼0.″12 -0.″2) observations of polarized 872 μm dust emission from the young multiple system VLA 1623 in ρ Ophiuchus and the protostar L1527 in Taurus. We detect the circumstellar material of VLA 1623A, the extended Keplerian disk surrounding VLA 1623A that we call VLA 1623CBdisk, VLA 1623B, VLA 1623W, and L1527 strongly in the polarized emission, at the ∼1%-3% level. We spatially resolve VLA 1623A into two sources, VLA 1623Aa and VLA 1623Ab, separated by ∼30 au and located within a cavity of radius ∼50 au within the circumbinary Keplerian disk, as well as the edge-on disk of VLA 1623W. The polarization angle of the emission is uniform across each protostellar source and nearly coincides with each disk's minor axis. The offsets between the minor axis position angle and the polarization angle are not uniformly distributed at the P ≲ 2 ×10-4 level. The circumbinary disk surrounding VLA 1623Aab is azimuthally symmetrically polarized. Each compact source's emission is partially optically thick (τ 1) at 872 μm, complicating interpretations of polarization involving aligned grains. We find evidence against alignment by radiative flux in each source, particularly in the edge-on VLA 1623W and L1527. We detect astrometric offsets between the polarized emission and the total intensity in VLA 1623Aa, VLA 1623Ab, and VLA 1623B, as predicted if self-scattering in the optically thick limit operates. We conclude that self-scattering is likely responsible for disk-scale polarization at 872 μm in these systems.Fil: Harris, Robert J.. University of Illinois. Urbana - Champaign; Estados UnidosFil: Cox, Erin G.. University of Illinois. Urbana - Champaign; Estados UnidosFil: Looney, Leslie W.. University of Illinois. Urbana - Champaign; Estados UnidosFil: Li, Zhi-Yun. University of Virginia; Estados UnidosFil: Yang, Haifeng. University of Virginia; Estados UnidosFil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Kwon, Woojin. Korea Astronomy And Space Science Institute; Corea del SurFil: Sadavoy, Sarah. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Segura Cox, Dominique. University of Illinois. Urbana - Champaign; Estados UnidosFil: Stephens, Ian. Harvard-Smithsonian Center for Astrophysics; Estados UnidosFil: Tobin, John. Oklahoma State University; Estados Unidos. Leiden University; Países BajosIOP Publishing2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/82424Harris, Robert J.; Cox, Erin G.; Looney, Leslie W.; Li, Zhi-Yun; Yang, Haifeng; et al.; ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527; IOP Publishing; Astrophysical Journal; 861; 2; 7-2018; 1-220004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aac6ecinfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aac6ecinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:42:04Zoai:ri.conicet.gov.ar:11336/82424instacron: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 10:42:04.516CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
title ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
spellingShingle ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
Harris, Robert J.
CIRCUMSTELLAR MATTER
SCATTERING
STARS: FORMATION
STARS: MAGNETIC FIELD
title_short ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
title_full ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
title_fullStr ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
title_full_unstemmed ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
title_sort ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527
dc.creator.none.fl_str_mv Harris, Robert J.
Cox, Erin G.
Looney, Leslie W.
Li, Zhi-Yun
Yang, Haifeng
Fernandez Lopez, Manuel
Kwon, Woojin
Sadavoy, Sarah
Segura Cox, Dominique
Stephens, Ian
Tobin, John
author Harris, Robert J.
author_facet Harris, Robert J.
Cox, Erin G.
Looney, Leslie W.
Li, Zhi-Yun
Yang, Haifeng
Fernandez Lopez, Manuel
Kwon, Woojin
Sadavoy, Sarah
Segura Cox, Dominique
Stephens, Ian
Tobin, John
author_role author
author2 Cox, Erin G.
Looney, Leslie W.
Li, Zhi-Yun
Yang, Haifeng
Fernandez Lopez, Manuel
Kwon, Woojin
Sadavoy, Sarah
Segura Cox, Dominique
Stephens, Ian
Tobin, John
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv CIRCUMSTELLAR MATTER
SCATTERING
STARS: FORMATION
STARS: MAGNETIC FIELD
topic CIRCUMSTELLAR MATTER
SCATTERING
STARS: FORMATION
STARS: MAGNETIC FIELD
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 high-sensitivity (σ I ∼ 0.2-0.5 mJy, σ QU ∼ 0.05 mJy), high-resolution (∼0.″12 -0.″2) observations of polarized 872 μm dust emission from the young multiple system VLA 1623 in ρ Ophiuchus and the protostar L1527 in Taurus. We detect the circumstellar material of VLA 1623A, the extended Keplerian disk surrounding VLA 1623A that we call VLA 1623CBdisk, VLA 1623B, VLA 1623W, and L1527 strongly in the polarized emission, at the ∼1%-3% level. We spatially resolve VLA 1623A into two sources, VLA 1623Aa and VLA 1623Ab, separated by ∼30 au and located within a cavity of radius ∼50 au within the circumbinary Keplerian disk, as well as the edge-on disk of VLA 1623W. The polarization angle of the emission is uniform across each protostellar source and nearly coincides with each disk's minor axis. The offsets between the minor axis position angle and the polarization angle are not uniformly distributed at the P ≲ 2 ×10-4 level. The circumbinary disk surrounding VLA 1623Aab is azimuthally symmetrically polarized. Each compact source's emission is partially optically thick (τ 1) at 872 μm, complicating interpretations of polarization involving aligned grains. We find evidence against alignment by radiative flux in each source, particularly in the edge-on VLA 1623W and L1527. We detect astrometric offsets between the polarized emission and the total intensity in VLA 1623Aa, VLA 1623Ab, and VLA 1623B, as predicted if self-scattering in the optically thick limit operates. We conclude that self-scattering is likely responsible for disk-scale polarization at 872 μm in these systems.
Fil: Harris, Robert J.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Cox, Erin G.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Looney, Leslie W.. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Li, Zhi-Yun. University of Virginia; Estados Unidos
Fil: Yang, Haifeng. University of Virginia; Estados Unidos
Fil: Fernandez Lopez, Manuel. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Kwon, Woojin. Korea Astronomy And Space Science Institute; Corea del Sur
Fil: Sadavoy, Sarah. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Segura Cox, Dominique. University of Illinois. Urbana - Champaign; Estados Unidos
Fil: Stephens, Ian. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
Fil: Tobin, John. Oklahoma State University; Estados Unidos. Leiden University; Países Bajos
description We present high-sensitivity (σ I ∼ 0.2-0.5 mJy, σ QU ∼ 0.05 mJy), high-resolution (∼0.″12 -0.″2) observations of polarized 872 μm dust emission from the young multiple system VLA 1623 in ρ Ophiuchus and the protostar L1527 in Taurus. We detect the circumstellar material of VLA 1623A, the extended Keplerian disk surrounding VLA 1623A that we call VLA 1623CBdisk, VLA 1623B, VLA 1623W, and L1527 strongly in the polarized emission, at the ∼1%-3% level. We spatially resolve VLA 1623A into two sources, VLA 1623Aa and VLA 1623Ab, separated by ∼30 au and located within a cavity of radius ∼50 au within the circumbinary Keplerian disk, as well as the edge-on disk of VLA 1623W. The polarization angle of the emission is uniform across each protostellar source and nearly coincides with each disk's minor axis. The offsets between the minor axis position angle and the polarization angle are not uniformly distributed at the P ≲ 2 ×10-4 level. The circumbinary disk surrounding VLA 1623Aab is azimuthally symmetrically polarized. Each compact source's emission is partially optically thick (τ 1) at 872 μm, complicating interpretations of polarization involving aligned grains. We find evidence against alignment by radiative flux in each source, particularly in the edge-on VLA 1623W and L1527. We detect astrometric offsets between the polarized emission and the total intensity in VLA 1623Aa, VLA 1623Ab, and VLA 1623B, as predicted if self-scattering in the optically thick limit operates. We conclude that self-scattering is likely responsible for disk-scale polarization at 872 μm in these systems.
publishDate 2018
dc.date.none.fl_str_mv 2018-07
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/11336/82424
Harris, Robert J.; Cox, Erin G.; Looney, Leslie W.; Li, Zhi-Yun; Yang, Haifeng; et al.; ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527; IOP Publishing; Astrophysical Journal; 861; 2; 7-2018; 1-22
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/82424
identifier_str_mv Harris, Robert J.; Cox, Erin G.; Looney, Leslie W.; Li, Zhi-Yun; Yang, Haifeng; et al.; ALMA Observations of Polarized 872 μm Dust Emission from the Protostellar Systems VLA 1623 and L1527; IOP Publishing; Astrophysical Journal; 861; 2; 7-2018; 1-22
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/10.3847/1538-4357/aac6ec
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aac6ec
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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score 13.070432

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