Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System

Autores
Yang, Haifeng; Fernandez Lopez, Manuel; Li, Zhi Yun; Stephens, Ian; Looney, Leslie W.; Zhe Yu, Daniel Lin; Harrison, Rachel
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We investigate the crescent-shaped dust trap in the transition disk Oph IRS 48 using well-resolved (sub) millimeter polarimetric observations at ALMA Band 7 (870 μm). The dust polarization map reveals patterns consistent with dust-scattering-induced polarization. There is a relative displacement between the polarized flux and the total flux, which holds the key to understanding the dust scale heights in this system. We model the polarization observations, focusing on the effects of dust scale heights. We find that the interplay between the inclination-induced polarization and the polarization arising from radiation anisotropy in the crescent determines the observed polarization; the anisotropy is controlled by the dust optical depth along the midplane, which is, in turn, determined by the dust scale height in the vertical direction. We find that the dust grains can be neither completely settled nor well mixed with the gas. The completely settled case produces little radial displacement between the total and polarized flux, while the well-mixed case produces an azimuthal pattern in the outer (radial) edge of the crescent that is not observed. Our best model has a gas-to-dust scale height ratio of 2 and can reproduce both the radial displacement and the azimuthal displacement between the total and polarized flux. We infer an effective turbulence α parameter of approximately 0.0001–0.005. The scattering-induced polarization provides insight into a turbulent vortex with a moderate level of dust settling in the IRS 48 system, which is hard to achieve otherwise.
Fil: Yang, Haifeng. Peking University; China
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: Li, Zhi Yun. University of Virginia; Estados Unidos
Fil: Stephens, Ian. Worcester State University; Estados Unidos
Fil: Looney, Leslie W.. University of Illinois at Urbana; Estados Unidos
Fil: Zhe Yu, Daniel Lin. University of Virginia; Estados Unidos
Fil: Harrison, Rachel. University of Illinois at Urbana; Estados Unidos
Materia
Interferometry
Polarimetry
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/268317
Acceder
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spelling Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 SystemYang, HaifengFernandez Lopez, ManuelLi, Zhi YunStephens, IanLooney, Leslie W.Zhe Yu, Daniel LinHarrison, RachelInterferometryPolarimetryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We investigate the crescent-shaped dust trap in the transition disk Oph IRS 48 using well-resolved (sub) millimeter polarimetric observations at ALMA Band 7 (870 μm). The dust polarization map reveals patterns consistent with dust-scattering-induced polarization. There is a relative displacement between the polarized flux and the total flux, which holds the key to understanding the dust scale heights in this system. We model the polarization observations, focusing on the effects of dust scale heights. We find that the interplay between the inclination-induced polarization and the polarization arising from radiation anisotropy in the crescent determines the observed polarization; the anisotropy is controlled by the dust optical depth along the midplane, which is, in turn, determined by the dust scale height in the vertical direction. We find that the dust grains can be neither completely settled nor well mixed with the gas. The completely settled case produces little radial displacement between the total and polarized flux, while the well-mixed case produces an azimuthal pattern in the outer (radial) edge of the crescent that is not observed. Our best model has a gas-to-dust scale height ratio of 2 and can reproduce both the radial displacement and the azimuthal displacement between the total and polarized flux. We infer an effective turbulence α parameter of approximately 0.0001–0.005. The scattering-induced polarization provides insight into a turbulent vortex with a moderate level of dust settling in the IRS 48 system, which is hard to achieve otherwise.Fil: Yang, Haifeng. Peking University; ChinaFil: 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: Li, Zhi Yun. University of Virginia; Estados UnidosFil: Stephens, Ian. Worcester State University; Estados UnidosFil: Looney, Leslie W.. University of Illinois at Urbana; Estados UnidosFil: Zhe Yu, Daniel Lin. University of Virginia; Estados UnidosFil: Harrison, Rachel. University of Illinois at Urbana; Estados UnidosIOP Publishing2024-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268317Yang, Haifeng; Fernandez Lopez, Manuel; Li, Zhi Yun; Stephens, Ian; Looney, Leslie W.; et al.; Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System; IOP Publishing; Astrophysical Journal; 963; 2; 3-2024; 134; 1-80004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/ad2346info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ad2346info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:54:33Zoai:ri.conicet.gov.ar:11336/268317instacron: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 09:54:33.442CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
title Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
spellingShingle Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
Yang, Haifeng
Interferometry
Polarimetry
title_short Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
title_full Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
title_fullStr Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
title_full_unstemmed Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
title_sort Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System
dc.creator.none.fl_str_mv Yang, Haifeng
Fernandez Lopez, Manuel
Li, Zhi Yun
Stephens, Ian
Looney, Leslie W.
Zhe Yu, Daniel Lin
Harrison, Rachel
author Yang, Haifeng
author_facet Yang, Haifeng
Fernandez Lopez, Manuel
Li, Zhi Yun
Stephens, Ian
Looney, Leslie W.
Zhe Yu, Daniel Lin
Harrison, Rachel
author_role author
author2 Fernandez Lopez, Manuel
Li, Zhi Yun
Stephens, Ian
Looney, Leslie W.
Zhe Yu, Daniel Lin
Harrison, Rachel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Interferometry
Polarimetry
topic Interferometry
Polarimetry
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 investigate the crescent-shaped dust trap in the transition disk Oph IRS 48 using well-resolved (sub) millimeter polarimetric observations at ALMA Band 7 (870 μm). The dust polarization map reveals patterns consistent with dust-scattering-induced polarization. There is a relative displacement between the polarized flux and the total flux, which holds the key to understanding the dust scale heights in this system. We model the polarization observations, focusing on the effects of dust scale heights. We find that the interplay between the inclination-induced polarization and the polarization arising from radiation anisotropy in the crescent determines the observed polarization; the anisotropy is controlled by the dust optical depth along the midplane, which is, in turn, determined by the dust scale height in the vertical direction. We find that the dust grains can be neither completely settled nor well mixed with the gas. The completely settled case produces little radial displacement between the total and polarized flux, while the well-mixed case produces an azimuthal pattern in the outer (radial) edge of the crescent that is not observed. Our best model has a gas-to-dust scale height ratio of 2 and can reproduce both the radial displacement and the azimuthal displacement between the total and polarized flux. We infer an effective turbulence α parameter of approximately 0.0001–0.005. The scattering-induced polarization provides insight into a turbulent vortex with a moderate level of dust settling in the IRS 48 system, which is hard to achieve otherwise.
Fil: Yang, Haifeng. Peking University; China
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: Li, Zhi Yun. University of Virginia; Estados Unidos
Fil: Stephens, Ian. Worcester State University; Estados Unidos
Fil: Looney, Leslie W.. University of Illinois at Urbana; Estados Unidos
Fil: Zhe Yu, Daniel Lin. University of Virginia; Estados Unidos
Fil: Harrison, Rachel. University of Illinois at Urbana; Estados Unidos
description We investigate the crescent-shaped dust trap in the transition disk Oph IRS 48 using well-resolved (sub) millimeter polarimetric observations at ALMA Band 7 (870 μm). The dust polarization map reveals patterns consistent with dust-scattering-induced polarization. There is a relative displacement between the polarized flux and the total flux, which holds the key to understanding the dust scale heights in this system. We model the polarization observations, focusing on the effects of dust scale heights. We find that the interplay between the inclination-induced polarization and the polarization arising from radiation anisotropy in the crescent determines the observed polarization; the anisotropy is controlled by the dust optical depth along the midplane, which is, in turn, determined by the dust scale height in the vertical direction. We find that the dust grains can be neither completely settled nor well mixed with the gas. The completely settled case produces little radial displacement between the total and polarized flux, while the well-mixed case produces an azimuthal pattern in the outer (radial) edge of the crescent that is not observed. Our best model has a gas-to-dust scale height ratio of 2 and can reproduce both the radial displacement and the azimuthal displacement between the total and polarized flux. We infer an effective turbulence α parameter of approximately 0.0001–0.005. The scattering-induced polarization provides insight into a turbulent vortex with a moderate level of dust settling in the IRS 48 system, which is hard to achieve otherwise.
publishDate 2024
dc.date.none.fl_str_mv 2024-03
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/11336/268317
Yang, Haifeng; Fernandez Lopez, Manuel; Li, Zhi Yun; Stephens, Ian; Looney, Leslie W.; et al.; Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System; IOP Publishing; Astrophysical Journal; 963; 2; 3-2024; 134; 1-8
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268317
identifier_str_mv Yang, Haifeng; Fernandez Lopez, Manuel; Li, Zhi Yun; Stephens, Ian; Looney, Leslie W.; et al.; Turbulent Vortex with Moderate Dust Settling Probed by Scattering-induced Polarization in the IRS 48 System; IOP Publishing; Astrophysical Journal; 963; 2; 3-2024; 134; 1-8
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/url/https://iopscience.iop.org/article/10.3847/1538-4357/ad2346
info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ad2346
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/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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