Hydrodynamical simulations of outbursts in protostellar accretion discs

Autores
Orellana, Mariana Dominga; Schreiber, Matthias R.
Año de publicación
2009
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Low mass young stellar objects (YSOs) occasionally display large scale luminosity fluctuations.The standard explanation for these outbursts are global thermalinstabilities in the accretion disc which occur if the inner regions are sufficiently hot for hydrogen to become ionized. However, early models (e.g. Bell & Lin 1994) require extremely low values of the viscosity parameter alpha to reproduce the observed time scales. Armitage et al. (2001) suggested that this issue might be resolved by combining a magnetically layered intermediate disc, gravitational instabilities in the outer disc, and thermal instabilities in the innermost disc. We intend to test this hypothesis by combining one-dimensional convective, vertical structure models with 1D time-dependent, radial diffusion models for the evolution of the disc in the vicinity of the star. Here we comment on our first results.
Fil: Orellana, Mariana Dominga. 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: Schreiber, Matthias R.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
52° Reunión anual de la Asociación Argentina de Astronomía
La Plata
Argentina
Asociación Argentina de Astronomía
Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas
Materia
protoplanetary disks
hydrodynamics: instabilities
stars: pre-main sequence
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:11336/232073
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Hydrodynamical simulations of outbursts in protostellar accretion discsOrellana, Mariana DomingaSchreiber, Matthias R.protoplanetary diskshydrodynamics: instabilitiesstars: pre-main sequencehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Low mass young stellar objects (YSOs) occasionally display large scale luminosity fluctuations.The standard explanation for these outbursts are global thermalinstabilities in the accretion disc which occur if the inner regions are sufficiently hot for hydrogen to become ionized. However, early models (e.g. Bell & Lin 1994) require extremely low values of the viscosity parameter alpha to reproduce the observed time scales. Armitage et al. (2001) suggested that this issue might be resolved by combining a magnetically layered intermediate disc, gravitational instabilities in the outer disc, and thermal instabilities in the innermost disc. We intend to test this hypothesis by combining one-dimensional convective, vertical structure models with 1D time-dependent, radial diffusion models for the evolution of the disc in the vicinity of the star. Here we comment on our first results.Fil: Orellana, Mariana Dominga. 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: Schreiber, Matthias R.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina52° Reunión anual de la Asociación Argentina de AstronomíaLa PlataArgentinaAsociación Argentina de AstronomíaUniversidad Nacional de La Plata. Facultad de Ciencias Astronómicas y GeofísicasAsociación Argentina de AstronomíaClariá, J. J.Brandi, E.Piatti, A. E.Bareilles, F. A.2009info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectReuniónJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/232073Hydrodynamical simulations of outbursts in protostellar accretion discs; 52° Reunión anual de la Asociación Argentina de Astronomía; La Plata; Argentina; 2009; 245-2480571-32851669-9521CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.astronomiaargentina.org.ar/b52/boletin_52.pdfinfo:eu-repo/semantics/altIdentifier/url/https://ui.adsabs.harvard.edu/abs/2009BAAA...52..245O/abstractinfo:eu-repo/semantics/altIdentifier/url/http://astronomiaargentina.fcaglp.unlp.edu.ar/b52/2009BAAA...52..245O.pdfNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:15:02Zoai:ri.conicet.gov.ar:11336/232073instacron: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 10:15:03.248CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Hydrodynamical simulations of outbursts in protostellar accretion discs
title Hydrodynamical simulations of outbursts in protostellar accretion discs
spellingShingle Hydrodynamical simulations of outbursts in protostellar accretion discs
Orellana, Mariana Dominga
protoplanetary disks
hydrodynamics: instabilities
stars: pre-main sequence
title_short Hydrodynamical simulations of outbursts in protostellar accretion discs
title_full Hydrodynamical simulations of outbursts in protostellar accretion discs
title_fullStr Hydrodynamical simulations of outbursts in protostellar accretion discs
title_full_unstemmed Hydrodynamical simulations of outbursts in protostellar accretion discs
title_sort Hydrodynamical simulations of outbursts in protostellar accretion discs
dc.creator.none.fl_str_mv Orellana, Mariana Dominga
Schreiber, Matthias R.
author Orellana, Mariana Dominga
author_facet Orellana, Mariana Dominga
Schreiber, Matthias R.
author_role author
author2 Schreiber, Matthias R.
author2_role author
dc.contributor.none.fl_str_mv Clariá, J. J.
Brandi, E.
Piatti, A. E.
Bareilles, F. A.
dc.subject.none.fl_str_mv protoplanetary disks
hydrodynamics: instabilities
stars: pre-main sequence
topic protoplanetary disks
hydrodynamics: instabilities
stars: pre-main sequence
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Low mass young stellar objects (YSOs) occasionally display large scale luminosity fluctuations.The standard explanation for these outbursts are global thermalinstabilities in the accretion disc which occur if the inner regions are sufficiently hot for hydrogen to become ionized. However, early models (e.g. Bell & Lin 1994) require extremely low values of the viscosity parameter alpha to reproduce the observed time scales. Armitage et al. (2001) suggested that this issue might be resolved by combining a magnetically layered intermediate disc, gravitational instabilities in the outer disc, and thermal instabilities in the innermost disc. We intend to test this hypothesis by combining one-dimensional convective, vertical structure models with 1D time-dependent, radial diffusion models for the evolution of the disc in the vicinity of the star. Here we comment on our first results.
Fil: Orellana, Mariana Dominga. 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: Schreiber, Matthias R.. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
52° Reunión anual de la Asociación Argentina de Astronomía
La Plata
Argentina
Asociación Argentina de Astronomía
Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas
description Low mass young stellar objects (YSOs) occasionally display large scale luminosity fluctuations.The standard explanation for these outbursts are global thermalinstabilities in the accretion disc which occur if the inner regions are sufficiently hot for hydrogen to become ionized. However, early models (e.g. Bell & Lin 1994) require extremely low values of the viscosity parameter alpha to reproduce the observed time scales. Armitage et al. (2001) suggested that this issue might be resolved by combining a magnetically layered intermediate disc, gravitational instabilities in the outer disc, and thermal instabilities in the innermost disc. We intend to test this hypothesis by combining one-dimensional convective, vertical structure models with 1D time-dependent, radial diffusion models for the evolution of the disc in the vicinity of the star. Here we comment on our first results.
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Reunión
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/232073
Hydrodynamical simulations of outbursts in protostellar accretion discs; 52° Reunión anual de la Asociación Argentina de Astronomía; La Plata; Argentina; 2009; 245-248
0571-3285
1669-9521
CONICET Digital
CONICET
url http://hdl.handle.net/11336/232073
identifier_str_mv Hydrodynamical simulations of outbursts in protostellar accretion discs; 52° Reunión anual de la Asociación Argentina de Astronomía; La Plata; Argentina; 2009; 245-248
0571-3285
1669-9521
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.astronomiaargentina.org.ar/b52/boletin_52.pdf
info:eu-repo/semantics/altIdentifier/url/https://ui.adsabs.harvard.edu/abs/2009BAAA...52..245O/abstract
info:eu-repo/semantics/altIdentifier/url/http://astronomiaargentina.fcaglp.unlp.edu.ar/b52/2009BAAA...52..245O.pdf
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.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Argentina de Astronomía
publisher.none.fl_str_mv Asociación Argentina de Astronomía
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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