A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS

Whenever in a classical accretion disk the thin disk approximation fails inte- rior to a certain radius, a transition from Keplerian to radial infalling trajectories should occur. We show that this transition is actually expected to occur inte- rior to a certain critical radius, provided surface den...

Descripción completa

Detalles Bibliográficos
Autores: Xavier Hernández, Pablo L. Rendón, Rosa G. Rodríguez-Mota, A. Capella
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2014
País:México
Institución:Universidad Nacional Autónoma de México
Repositorio:Redalyc-UNAM
OAI Identifier:oai:redalyc.org:57131044004
Acceso en línea:https://www.redalyc.org/articulo.oa?id=57131044004
Access Level:acceso abierto
Palabra clave:Física, Astronomía y Matemáticas
Accretion
jets — ISM
jets and outflows
accretion disks — hydrodynamics — galaxies
id MX_7e2fe19aeec91e6f728bbd60ae3689fe
oai_identifier_str oai:redalyc.org:57131044004
network_acronym_str MX
network_name_str México
repository_id_str
spelling A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETSXavier HernándezPablo L. RendónRosa G. Rodríguez-MotaA. CapellaFísica, Astronomía y MatemáticasAccretionjets — ISMjets and outflowsaccretion disks — hydrodynamics — galaxiesWhenever in a classical accretion disk the thin disk approximation fails inte- rior to a certain radius, a transition from Keplerian to radial infalling trajectories should occur. We show that this transition is actually expected to occur inte- rior to a certain critical radius, provided surface density profiles are steeper than Σ(R) ∝ R−1/2 , and further, that it probably corresponds to the observationally inferred phenomena of thick hot walls internally limiting the extent of many stellar accretion disks. Infalling trajectories will lead to the convergent focusing and con- centration of matter towards the very central regions, most of which will simply be swallowed by the central object. We show through a perturbative hydrodynamical analysis, that this will naturally develop a well collimated pair of polar jets. A first analytic treatment of the problem described is given, proving the feasibility of purely hydrodynamical mechanisms for astrophysical jet generation.Universidad Nacional Autónoma de México2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf0185-1101https://www.redalyc.org/articulo.oa?id=57131044004Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.50reponame:Redalyc-UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenhttp://www.redalyc.org/revista.oa?id=571Revista Mexicana de Astronomía y Astrofísicainfo:eu-repo/semantics/openAccessoai:redalyc.org:571310440042025-09-03T18:07:38Z
dc.title.none.fl_str_mv A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
title A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
spellingShingle A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
Xavier Hernández
Física, Astronomía y Matemáticas
Accretion
jets — ISM
jets and outflows
accretion disks — hydrodynamics — galaxies
title_short A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
title_full A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
title_fullStr A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
title_full_unstemmed A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
title_sort A HYDRODYNAMICAL MECHANISM FOR GENERATING ASTROPHYSICAL JETS
dc.creator.none.fl_str_mv Xavier Hernández
Pablo L. Rendón
Rosa G. Rodríguez-Mota
A. Capella
author Xavier Hernández
author_facet Xavier Hernández
Pablo L. Rendón
Rosa G. Rodríguez-Mota
A. Capella
author_role author
author2 Pablo L. Rendón
Rosa G. Rodríguez-Mota
A. Capella
author2_role author
author
author
dc.subject.none.fl_str_mv Física, Astronomía y Matemáticas
Accretion
jets — ISM
jets and outflows
accretion disks — hydrodynamics — galaxies
topic Física, Astronomía y Matemáticas
Accretion
jets — ISM
jets and outflows
accretion disks — hydrodynamics — galaxies
description Whenever in a classical accretion disk the thin disk approximation fails inte- rior to a certain radius, a transition from Keplerian to radial infalling trajectories should occur. We show that this transition is actually expected to occur inte- rior to a certain critical radius, provided surface density profiles are steeper than Σ(R) ∝ R−1/2 , and further, that it probably corresponds to the observationally inferred phenomena of thick hot walls internally limiting the extent of many stellar accretion disks. Infalling trajectories will lead to the convergent focusing and con- centration of matter towards the very central regions, most of which will simply be swallowed by the central object. We show through a perturbative hydrodynamical analysis, that this will naturally develop a well collimated pair of polar jets. A first analytic treatment of the problem described is given, proving the feasibility of purely hydrodynamical mechanisms for astrophysical jet generation.
publishDate 2014
dc.date.none.fl_str_mv 2014
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0185-1101
https://www.redalyc.org/articulo.oa?id=57131044004
identifier_str_mv 0185-1101
url https://www.redalyc.org/articulo.oa?id=57131044004
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=571
dc.rights.none.fl_str_mv Revista Mexicana de Astronomía y Astrofísica
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Revista Mexicana de Astronomía y Astrofísica
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.50
reponame:Redalyc-UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Redalyc-UNAM
collection Redalyc-UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1858175862958981120
score 14.964252

Similares en LA Referencia