Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs

Autores
Lin, Zhe Yu Daniel; Li, Zhi Yun; Yang, Haifeng; Looney, Leslie W.; Stephens, Ian W.; Fernandez Lopez, Manuel; Harrison, Rachel E.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Recent (sub)millimetre polarization observations of protoplanetary discs reveal toroidally aligned, effectively prolate dust grains large enough (at least ∼100μm) to efficiently scatter millimetre light. The alignment mechanism for these grains remains unclear. We explore the possibility that gas drag aligns grains through gas-dust relative motion when the grain´s centre of mass is offset from its geometric centre, analogous to a badminton birdie´s alignment in flight. A simple grain model of two non-identical spheres illustrates how a grain undergoes damped oscillations from flow-induced restoring torques which align its geometric centre in the flow direction relative to its centre of mass. Assuming specular reflection and subsonic flow, we derive an analytical equation of motion for spheroids where the centre of mass can be shifted away from the spheroid´s geometric centre. We show that a prolate or an oblate grain can be aligned with the long axis parallel to the gas flow when the centre of mass is shifted along that axis. Both scenarios can explain the required effectively prolate grains inferred from observations. Application to a simple disc model shows that the alignment time-scales are shorter than or comparable to the orbital time. The grain alignment direction in a disc depends on the disc (sub-)structure and grain Stokes number (St) with azimuthal alignment for large St grains in sub-Keplerian smooth gas discs and for small St grains near the gas pressure extrema, such as rings and gaps.
Fil: Lin, Zhe Yu Daniel. University of Virginia; Estados Unidos
Fil: Li, Zhi Yun. University of Virginia; Estados Unidos
Fil: Yang, Haifeng. Peking University; China
Fil: Looney, Leslie W.. University of Illinois at Urbana; Estados Unidos
Fil: Stephens, Ian W.. Worcester State University; 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: Harrison, Rachel E.. University of Illinois at Urbana; Estados Unidos
Materia
Astrophysics - Earth and Planetary Astrophysics
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:11336/267605
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discsLin, Zhe Yu DanielLi, Zhi YunYang, HaifengLooney, Leslie W.Stephens, Ian W.Fernandez Lopez, ManuelHarrison, Rachel E.Astrophysics - Earth and Planetary Astrophysicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Recent (sub)millimetre polarization observations of protoplanetary discs reveal toroidally aligned, effectively prolate dust grains large enough (at least ∼100μm) to efficiently scatter millimetre light. The alignment mechanism for these grains remains unclear. We explore the possibility that gas drag aligns grains through gas-dust relative motion when the grain´s centre of mass is offset from its geometric centre, analogous to a badminton birdie´s alignment in flight. A simple grain model of two non-identical spheres illustrates how a grain undergoes damped oscillations from flow-induced restoring torques which align its geometric centre in the flow direction relative to its centre of mass. Assuming specular reflection and subsonic flow, we derive an analytical equation of motion for spheroids where the centre of mass can be shifted away from the spheroid´s geometric centre. We show that a prolate or an oblate grain can be aligned with the long axis parallel to the gas flow when the centre of mass is shifted along that axis. Both scenarios can explain the required effectively prolate grains inferred from observations. Application to a simple disc model shows that the alignment time-scales are shorter than or comparable to the orbital time. The grain alignment direction in a disc depends on the disc (sub-)structure and grain Stokes number (St) with azimuthal alignment for large St grains in sub-Keplerian smooth gas discs and for small St grains near the gas pressure extrema, such as rings and gaps.Fil: Lin, Zhe Yu Daniel. University of Virginia; Estados UnidosFil: Li, Zhi Yun. University of Virginia; Estados UnidosFil: Yang, Haifeng. Peking University; ChinaFil: Looney, Leslie W.. University of Illinois at Urbana; Estados UnidosFil: Stephens, Ian W.. Worcester State University; 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: Harrison, Rachel E.. University of Illinois at Urbana; Estados UnidosWiley Blackwell Publishing, Inc2024-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/267605Lin, Zhe Yu Daniel; Li, Zhi Yun; Yang, Haifeng; Looney, Leslie W.; Stephens, Ian W.; et al.; Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 534; 4; 11-2024; 3713-37330035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/534/4/3713/7783265info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stae2248info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:10:25Zoai:ri.conicet.gov.ar:11336/267605instacron: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 10:10:25.494CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
title Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
spellingShingle Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
Lin, Zhe Yu Daniel
Astrophysics - Earth and Planetary Astrophysics
title_short Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
title_full Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
title_fullStr Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
title_full_unstemmed Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
title_sort Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs
dc.creator.none.fl_str_mv Lin, Zhe Yu Daniel
Li, Zhi Yun
Yang, Haifeng
Looney, Leslie W.
Stephens, Ian W.
Fernandez Lopez, Manuel
Harrison, Rachel E.
author Lin, Zhe Yu Daniel
author_facet Lin, Zhe Yu Daniel
Li, Zhi Yun
Yang, Haifeng
Looney, Leslie W.
Stephens, Ian W.
Fernandez Lopez, Manuel
Harrison, Rachel E.
author_role author
author2 Li, Zhi Yun
Yang, Haifeng
Looney, Leslie W.
Stephens, Ian W.
Fernandez Lopez, Manuel
Harrison, Rachel E.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Astrophysics - Earth and Planetary Astrophysics
topic Astrophysics - Earth and Planetary Astrophysics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Recent (sub)millimetre polarization observations of protoplanetary discs reveal toroidally aligned, effectively prolate dust grains large enough (at least ∼100μm) to efficiently scatter millimetre light. The alignment mechanism for these grains remains unclear. We explore the possibility that gas drag aligns grains through gas-dust relative motion when the grain´s centre of mass is offset from its geometric centre, analogous to a badminton birdie´s alignment in flight. A simple grain model of two non-identical spheres illustrates how a grain undergoes damped oscillations from flow-induced restoring torques which align its geometric centre in the flow direction relative to its centre of mass. Assuming specular reflection and subsonic flow, we derive an analytical equation of motion for spheroids where the centre of mass can be shifted away from the spheroid´s geometric centre. We show that a prolate or an oblate grain can be aligned with the long axis parallel to the gas flow when the centre of mass is shifted along that axis. Both scenarios can explain the required effectively prolate grains inferred from observations. Application to a simple disc model shows that the alignment time-scales are shorter than or comparable to the orbital time. The grain alignment direction in a disc depends on the disc (sub-)structure and grain Stokes number (St) with azimuthal alignment for large St grains in sub-Keplerian smooth gas discs and for small St grains near the gas pressure extrema, such as rings and gaps.
Fil: Lin, Zhe Yu Daniel. University of Virginia; Estados Unidos
Fil: Li, Zhi Yun. University of Virginia; Estados Unidos
Fil: Yang, Haifeng. Peking University; China
Fil: Looney, Leslie W.. University of Illinois at Urbana; Estados Unidos
Fil: Stephens, Ian W.. Worcester State University; 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: Harrison, Rachel E.. University of Illinois at Urbana; Estados Unidos
description Recent (sub)millimetre polarization observations of protoplanetary discs reveal toroidally aligned, effectively prolate dust grains large enough (at least ∼100μm) to efficiently scatter millimetre light. The alignment mechanism for these grains remains unclear. We explore the possibility that gas drag aligns grains through gas-dust relative motion when the grain´s centre of mass is offset from its geometric centre, analogous to a badminton birdie´s alignment in flight. A simple grain model of two non-identical spheres illustrates how a grain undergoes damped oscillations from flow-induced restoring torques which align its geometric centre in the flow direction relative to its centre of mass. Assuming specular reflection and subsonic flow, we derive an analytical equation of motion for spheroids where the centre of mass can be shifted away from the spheroid´s geometric centre. We show that a prolate or an oblate grain can be aligned with the long axis parallel to the gas flow when the centre of mass is shifted along that axis. Both scenarios can explain the required effectively prolate grains inferred from observations. Application to a simple disc model shows that the alignment time-scales are shorter than or comparable to the orbital time. The grain alignment direction in a disc depends on the disc (sub-)structure and grain Stokes number (St) with azimuthal alignment for large St grains in sub-Keplerian smooth gas discs and for small St grains near the gas pressure extrema, such as rings and gaps.
publishDate 2024
dc.date.none.fl_str_mv 2024-11
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/11336/267605
Lin, Zhe Yu Daniel; Li, Zhi Yun; Yang, Haifeng; Looney, Leslie W.; Stephens, Ian W.; et al.; Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 534; 4; 11-2024; 3713-3733
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/267605
identifier_str_mv Lin, Zhe Yu Daniel; Li, Zhi Yun; Yang, Haifeng; Looney, Leslie W.; Stephens, Ian W.; et al.; Badminton birdie-like aerodynamic alignment of drifting dust grains by subsonic gaseous flows in protoplanetary discs; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 534; 4; 11-2024; 3713-3733
0035-8711
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://academic.oup.com/mnras/article/534/4/3713/7783265
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stae2248
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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