Velocity Structure of the Orion A Integral Shaped Filament

Star formation is fundamental for the processes of planet formation and galaxy evolution. Here we present an analysis of the gas kinematics of the ISF, a massive filament hosting a young embedded cluster, in the Orion A cloud through observations of different molecular transitions. We derive kinemat...

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Detalles Bibliográficos
Autor: González-Lobos, Valentina Isabel
Tipo de recurso: tesis de maestría
Estado:Versión publicada
Fecha de publicación:2019
País:Chile
OAI Identifier:oai:repositorio.anid.cl:10533/237599
Acceso en línea:https://hdl.handle.net/10533/237599
Access Level:acceso abierto
Palabra clave:Ciencias Naturales
Ciencias Físicas
Astronomía
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dc.title.es_CL.fl_str_mv Velocity Structure of the Orion A Integral Shaped Filament
La estructura de la velocidad del filamento Integral Shaped Filament de Orión A
title Velocity Structure of the Orion A Integral Shaped Filament
spellingShingle Velocity Structure of the Orion A Integral Shaped Filament
González-Lobos, Valentina Isabel
Ciencias Naturales
Ciencias Físicas
Astronomía
title_short Velocity Structure of the Orion A Integral Shaped Filament
title_full Velocity Structure of the Orion A Integral Shaped Filament
title_fullStr Velocity Structure of the Orion A Integral Shaped Filament
title_full_unstemmed Velocity Structure of the Orion A Integral Shaped Filament
title_sort Velocity Structure of the Orion A Integral Shaped Filament
dc.creator.none.fl_str_mv González-Lobos, Valentina Isabel
author González-Lobos, Valentina Isabel
author_facet González-Lobos, Valentina Isabel
author_role author
dc.contributor.advisor.none.fl_str_mv Stutz, Amelia M.
dc.contributor.institution.es_CL.fl_str_mv UNIVERSIDAD DE CONCEPCION
dc.subject.oecd1n.es_CL.fl_str_mv Ciencias Naturales
topic Ciencias Naturales
Ciencias Físicas
Astronomía
dc.subject.oecd2n.es_CL.fl_str_mv Ciencias Físicas
dc.subject.oecd3n.es_CL.fl_str_mv Astronomía
description Star formation is fundamental for the processes of planet formation and galaxy evolution. Here we present an analysis of the gas kinematics of the ISF, a massive filament hosting a young embedded cluster, in the Orion A cloud through observations of different molecular transitions. We derive kinematic parameters to construct intensity-weighted position-velocity diagrams and non-thermal velocity dispersion radial profiles of the filament. The radial velocity structure of the filament presents a velocity gradient that terminates with a blue-shifted velocity peak near the center of the cluster. The global velocity structure is consistent with the wave-like appearance of the filament, and we also report the presence of small velocity fluctuations along the filament reminiscent of torsional waves. From the velocity dispersion radial profiles we find supersonic velocities that depend on each molecular tracer. We estimated the specific kinetic energy and compared to the gravitational potential, showing that the filament is gravitationally bound. This suggests that either the filament is collapsing or that other forces are required to provide support against gravity. Our analysis indicate that the cluster formation scenario is more complex that previously thought. We propose to study the influence of magnetic fields more carefully through numerical simulations and combining Zeeman with polarization observations.
publishDate 2019
dc.date.issued.es_CL.fl_str_mv 2019
dc.date.accessioned.none.fl_str_mv 2020-01-06T20:41:11Z
2022-08-23T03:10:53Z
dc.date.available.none.fl_str_mv 2020-01-06T20:41:11Z
2022-08-23T03:10:53Z
dc.type.none.fl_str_mv Tesis Magíster
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spelling UNIVERSIDAD DE CONCEPCIONGonzález-Lobos, Valentina Isabel2019https://hdl.handle.net/10533/237599http://purl.org/coar/access_right/c_abf2AstronomíaCiencias FísicasCiencias NaturalesVelocity Structure of the Orion A Integral Shaped FilamentStutz, Amelia M.UNIVERSIDAD DE CONCEPCIONChileGonzález-Lobos, Valentina Isabel2020-01-06T20:41:11Z2022-08-23T03:10:53Z2020-01-06T20:41:11Z2022-08-23T03:10:53Z2019Star formation is fundamental for the processes of planet formation and galaxy evolution. Here we present an analysis of the gas kinematics of the ISF, a massive filament hosting a young embedded cluster, in the Orion A cloud through observations of different molecular transitions. We derive kinematic parameters to construct intensity-weighted position-velocity diagrams and non-thermal velocity dispersion radial profiles of the filament. The radial velocity structure of the filament presents a velocity gradient that terminates with a blue-shifted velocity peak near the center of the cluster. The global velocity structure is consistent with the wave-like appearance of the filament, and we also report the presence of small velocity fluctuations along the filament reminiscent of torsional waves. From the velocity dispersion radial profiles we find supersonic velocities that depend on each molecular tracer. We estimated the specific kinetic energy and compared to the gravitational potential, showing that the filament is gravitationally bound. This suggests that either the filament is collapsing or that other forces are required to provide support against gravity. Our analysis indicate that the cluster formation scenario is more complex that previously thought. We propose to study the influence of magnetic fields more carefully through numerical simulations and combining Zeeman with polarization observations.La formación estelar es fundamental para los procesos de formación planetaria y evolución de galaxias. Aquí presentamos un análisis cinemático del gas molecular del filamento ISF, un filamento masivo que contiene un cúmulo joven, en la nube de Orión A, a través de observaciones de distintas transiciones moleculares. Derivamos los parámetros cinemáticos del filamento para construir diagramas de posición-velocidad ponderados por la intensidad, y perfiles radiales de la dispersion de velocidad. La estructura de velocidad radial del filamento presenta una gradiente de velocidad que termina en un máximo corrido hacia el azul y que está posicionado cerca del centro del cúmulo. La estructura de la velocidad radial global es consistente con la apariencia ondulatoria del filamento, ademas reportamos la presencia de pequeñas fluctuaciones en la velocidad a lo largo del filamento que son reminiscentes a ondas torsionales. De los perfiles radiales de la dispersión de velocidad encontramos velocidades supersónicas que dependen de la línea molecular. Con estos estimamos la energía cinética especifica y comparamos con el potencial gravitacional del filamento, revelando que el filamento está ligado gravitacionalmente. Esto indicaría que o el filamento está colapsando o que otras fuerzas son necesarias para soportar la gravedad. Nuestro análisis indica que el escenario de formación de cúmulos es más complejo de lo que se cree. Proponemos estudiar la influencia de los campos magnéticos con más detalle a través de simulaciones numéricas, y combinando observaciones del efecto Zeeman y polarización.PFCHA-BecasPFCHA-Becas22182160https://hdl.handle.net/10533/237599instname: Conicytreponame: Repositorio Digital RI2.0info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/grantAgreement//22182160info:eu-repo/semantics/dataset/hdl.handle.net/10533/93488info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/3.0/cl/Ciencias NaturalesCiencias FísicasAstronomíaVelocity Structure of the Orion A Integral Shaped FilamentLa estructura de la velocidad del filamento Integral Shaped Filament de Orión ATesis Magísterinfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/publishedVersionTesisTesishttps://hdl.handle.net/10533/237599PFCHA-Becas98faa42e-527a-4530-bf7b-35a931ccc822virtual::63473-198faa42e-527a-4530-bf7b-35a931ccc822virtual::63473-1ORIGINALgonzalez-lobos_MSc-thesis.pdfapplication/pdf5287067https://repositorio.anid.cl/bitstreams/e9e689f8-0511-43b4-bf7c-4c0da5a2a66d/download0888db858a1ec2793982fbb650b89370MD51CC-LICENSElicense_rdfapplication/octet-stream1379https://repositorio.anid.cl/bitstreams/a8460ef7-a0b0-4ca8-8b09-dd24651951c1/downloadf7a11d45fd81c28c2894e0236396e7f4MD52LICENSElicense.txttext/plain1779https://repositorio.anid.cl/bitstreams/3adc9136-2c5f-4dc2-8df1-384d61d0cf8b/download593a6e7305c66c56041a9f9e15a649c1MD53TEXTgonzalez-lobos_MSc-thesis.pdf.txtExtracted texttext/plain151088https://repositorio.anid.cl/bitstreams/d6376ccf-7a00-49be-8dea-12def99b57b2/download87550ca3c86d5733777003c48ad07a08MD54THUMBNAILgonzalez-lobos_MSc-thesis.pdf.jpgIM Thumbnailimage/jpeg4140https://repositorio.anid.cl/bitstreams/ca23b0c9-9cba-4c09-b0ed-860aee2ef349/downloadf1cd826a208c41b34b310204b3a037d0MD5510533/237599oai:repositorio.anid.cl:10533/2375992023-07-24 04:22:40.206http://creativecommons.org/licenses/by-nc/3.0/cl/info:eu-repo/semantics/openAccesshttps://repositorio.anid.clRepositorio ANIDaletelier@anid.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