Episodicity in accretion-ejection processes associated with IRAS 15398-3359

Autores
Guzmán Ccolque, Estrella; Fernandez Lopez, Manuel; Vazzano, María Mercedes; de Gregorio, I.; Plunkett, A.; Santamaría Miranda, A.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. The protostar IRAS 15398-3359 is associated with a bipolar molecular outflow ejected in an nearly northeast–southwest (NE–SW) direction, which has been extensively studied. Previous episodic accretion events have been suggested by this source. Furthermore, the analysis of the morphology and kinematics of the molecular outflow revealed the presence of four 12CO (2–1) bipolarelliptical shock-like structures identified in both lobes. These structures seem to trace different ejections inclined ∼10◦from each otheron the plane of the sky. This led to the hypothesis that the outflow axis likely precesses and launches material episodically. Aims. Since several authors reached the conclusion of the same episodicity scenario by independent observations, IRAS 15398-3359has become an ideal target to empirically analyze the relationship between accretion and ejection processes.Methods. We analyzed ALMA archive observations in Band 6, revealing the presence of low-velocity (<3.5 km s−1) emission fromthe 12CO (2–1) line to the south and north of the protostar. We studied the morphology and kinematics of the gas; our study seems tosupport the hypothesis of a precessing episodic outflow.Results. The ALMA observations reveal a north–south (N–S) outflow most likely associated with the IRAS 15398-3359 protostellarsystem. This outflow could be older than the well-studied NE–SW outflow. The orientation of the N–S outflow is 50◦–60◦ on the planeof the sky away from that of the NE–SW outflow. We also analyzed the spectral energy distribution of a far away young star andpreliminarily discard it as the driver of the SE outflow remnants. Conclusions. The new observations support the hypothesis of strong episodic accretion-ejection events in IRAS 15398-3359, accompanied by dramatic changes in the orientation of its ejection axis, implying that all the outflows in the region may have been driven bythe same protostar
Fil: Guzmán Ccolque, Estrella. 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: 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: Vazzano, María Mercedes. 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: de Gregorio, I.. European Southern Observatory Chile.; Chile
Fil: Plunkett, A.. National Radio Astronomy Observatory; Estados Unidos
Fil: Santamaría Miranda, A.. European Southern Observatory Chile.; Chile
Materia
ISM: jets and outflows
submillimeter:ISM
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:11336/251565
Acceder
id CONICETDig_d3ff4b4212f684feba3a690aeca642d5
oai_identifier_str oai:ri.conicet.gov.ar:11336/251565
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Episodicity in accretion-ejection processes associated with IRAS 15398-3359Guzmán Ccolque, EstrellaFernandez Lopez, ManuelVazzano, María Mercedesde Gregorio, I.Plunkett, A.Santamaría Miranda, A.ISM: jets and outflowssubmillimeter:ISMhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. The protostar IRAS 15398-3359 is associated with a bipolar molecular outflow ejected in an nearly northeast–southwest (NE–SW) direction, which has been extensively studied. Previous episodic accretion events have been suggested by this source. Furthermore, the analysis of the morphology and kinematics of the molecular outflow revealed the presence of four 12CO (2–1) bipolarelliptical shock-like structures identified in both lobes. These structures seem to trace different ejections inclined ∼10◦from each otheron the plane of the sky. This led to the hypothesis that the outflow axis likely precesses and launches material episodically. Aims. Since several authors reached the conclusion of the same episodicity scenario by independent observations, IRAS 15398-3359has become an ideal target to empirically analyze the relationship between accretion and ejection processes.Methods. We analyzed ALMA archive observations in Band 6, revealing the presence of low-velocity (<3.5 km s−1) emission fromthe 12CO (2–1) line to the south and north of the protostar. We studied the morphology and kinematics of the gas; our study seems tosupport the hypothesis of a precessing episodic outflow.Results. The ALMA observations reveal a north–south (N–S) outflow most likely associated with the IRAS 15398-3359 protostellarsystem. This outflow could be older than the well-studied NE–SW outflow. The orientation of the N–S outflow is 50◦–60◦ on the planeof the sky away from that of the NE–SW outflow. We also analyzed the spectral energy distribution of a far away young star andpreliminarily discard it as the driver of the SE outflow remnants. Conclusions. The new observations support the hypothesis of strong episodic accretion-ejection events in IRAS 15398-3359, accompanied by dramatic changes in the orientation of its ejection axis, implying that all the outflows in the region may have been driven bythe same protostarFil: Guzmán Ccolque, Estrella. 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: 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: Vazzano, María Mercedes. 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: de Gregorio, I.. European Southern Observatory Chile.; ChileFil: Plunkett, A.. National Radio Astronomy Observatory; Estados UnidosFil: Santamaría Miranda, A.. European Southern Observatory Chile.; ChileEDP Sciences2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/251565Guzmán Ccolque, Estrella; Fernandez Lopez, Manuel; Vazzano, María Mercedes; de Gregorio, I.; Plunkett, A.; et al.; Episodicity in accretion-ejection processes associated with IRAS 15398-3359; EDP Sciences; Astronomy and Astrophysics; 686; A143; 6-2024; 1-70004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202348816info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202348816info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:04Zoai:ri.conicet.gov.ar:11336/251565instacron: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 10:29:05.008CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Episodicity in accretion-ejection processes associated with IRAS 15398-3359
title Episodicity in accretion-ejection processes associated with IRAS 15398-3359
spellingShingle Episodicity in accretion-ejection processes associated with IRAS 15398-3359
Guzmán Ccolque, Estrella
ISM: jets and outflows
submillimeter:ISM
title_short Episodicity in accretion-ejection processes associated with IRAS 15398-3359
title_full Episodicity in accretion-ejection processes associated with IRAS 15398-3359
title_fullStr Episodicity in accretion-ejection processes associated with IRAS 15398-3359
title_full_unstemmed Episodicity in accretion-ejection processes associated with IRAS 15398-3359
title_sort Episodicity in accretion-ejection processes associated with IRAS 15398-3359
dc.creator.none.fl_str_mv Guzmán Ccolque, Estrella
Fernandez Lopez, Manuel
Vazzano, María Mercedes
de Gregorio, I.
Plunkett, A.
Santamaría Miranda, A.
author Guzmán Ccolque, Estrella
author_facet Guzmán Ccolque, Estrella
Fernandez Lopez, Manuel
Vazzano, María Mercedes
de Gregorio, I.
Plunkett, A.
Santamaría Miranda, A.
author_role author
author2 Fernandez Lopez, Manuel
Vazzano, María Mercedes
de Gregorio, I.
Plunkett, A.
Santamaría Miranda, A.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv ISM: jets and outflows
submillimeter:ISM
topic ISM: jets and outflows
submillimeter:ISM
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. The protostar IRAS 15398-3359 is associated with a bipolar molecular outflow ejected in an nearly northeast–southwest (NE–SW) direction, which has been extensively studied. Previous episodic accretion events have been suggested by this source. Furthermore, the analysis of the morphology and kinematics of the molecular outflow revealed the presence of four 12CO (2–1) bipolarelliptical shock-like structures identified in both lobes. These structures seem to trace different ejections inclined ∼10◦from each otheron the plane of the sky. This led to the hypothesis that the outflow axis likely precesses and launches material episodically. Aims. Since several authors reached the conclusion of the same episodicity scenario by independent observations, IRAS 15398-3359has become an ideal target to empirically analyze the relationship between accretion and ejection processes.Methods. We analyzed ALMA archive observations in Band 6, revealing the presence of low-velocity (<3.5 km s−1) emission fromthe 12CO (2–1) line to the south and north of the protostar. We studied the morphology and kinematics of the gas; our study seems tosupport the hypothesis of a precessing episodic outflow.Results. The ALMA observations reveal a north–south (N–S) outflow most likely associated with the IRAS 15398-3359 protostellarsystem. This outflow could be older than the well-studied NE–SW outflow. The orientation of the N–S outflow is 50◦–60◦ on the planeof the sky away from that of the NE–SW outflow. We also analyzed the spectral energy distribution of a far away young star andpreliminarily discard it as the driver of the SE outflow remnants. Conclusions. The new observations support the hypothesis of strong episodic accretion-ejection events in IRAS 15398-3359, accompanied by dramatic changes in the orientation of its ejection axis, implying that all the outflows in the region may have been driven bythe same protostar
Fil: Guzmán Ccolque, Estrella. 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: 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: Vazzano, María Mercedes. 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: de Gregorio, I.. European Southern Observatory Chile.; Chile
Fil: Plunkett, A.. National Radio Astronomy Observatory; Estados Unidos
Fil: Santamaría Miranda, A.. European Southern Observatory Chile.; Chile
description Context. The protostar IRAS 15398-3359 is associated with a bipolar molecular outflow ejected in an nearly northeast–southwest (NE–SW) direction, which has been extensively studied. Previous episodic accretion events have been suggested by this source. Furthermore, the analysis of the morphology and kinematics of the molecular outflow revealed the presence of four 12CO (2–1) bipolarelliptical shock-like structures identified in both lobes. These structures seem to trace different ejections inclined ∼10◦from each otheron the plane of the sky. This led to the hypothesis that the outflow axis likely precesses and launches material episodically. Aims. Since several authors reached the conclusion of the same episodicity scenario by independent observations, IRAS 15398-3359has become an ideal target to empirically analyze the relationship between accretion and ejection processes.Methods. We analyzed ALMA archive observations in Band 6, revealing the presence of low-velocity (<3.5 km s−1) emission fromthe 12CO (2–1) line to the south and north of the protostar. We studied the morphology and kinematics of the gas; our study seems tosupport the hypothesis of a precessing episodic outflow.Results. The ALMA observations reveal a north–south (N–S) outflow most likely associated with the IRAS 15398-3359 protostellarsystem. This outflow could be older than the well-studied NE–SW outflow. The orientation of the N–S outflow is 50◦–60◦ on the planeof the sky away from that of the NE–SW outflow. We also analyzed the spectral energy distribution of a far away young star andpreliminarily discard it as the driver of the SE outflow remnants. Conclusions. The new observations support the hypothesis of strong episodic accretion-ejection events in IRAS 15398-3359, accompanied by dramatic changes in the orientation of its ejection axis, implying that all the outflows in the region may have been driven bythe same protostar
publishDate 2024
dc.date.none.fl_str_mv 2024-06
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/11336/251565
Guzmán Ccolque, Estrella; Fernandez Lopez, Manuel; Vazzano, María Mercedes; de Gregorio, I.; Plunkett, A.; et al.; Episodicity in accretion-ejection processes associated with IRAS 15398-3359; EDP Sciences; Astronomy and Astrophysics; 686; A143; 6-2024; 1-7
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/251565
identifier_str_mv Guzmán Ccolque, Estrella; Fernandez Lopez, Manuel; Vazzano, María Mercedes; de Gregorio, I.; Plunkett, A.; et al.; Episodicity in accretion-ejection processes associated with IRAS 15398-3359; EDP Sciences; Astronomy and Astrophysics; 686; A143; 6-2024; 1-7
0004-6361
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://www.aanda.org/10.1051/0004-6361/202348816
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202348816
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 EDP Sciences
publisher.none.fl_str_mv EDP Sciences
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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