Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet

Autores
Zapata, Luis A.; Lizano, Susana; Rodríguez, Luis F.; Ho, Paul T. P.; Loinard, Laurent; Fernandez Lopez, Manuel; Tafoya, Daniel
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present 12CO(2-1) line and 1300 μm continuum observations made with the Submillimeter Array of the young star DG Tau B. We find, in the continuum observations, emission arising from the circumstellar disk surrounding DG Tau B. The 12CO(2-1) line observations, on the other hand, revealed emission associated with the disk and the asymmetric outflow related with this source. Velocity asymmetries about the flow axis are found over the entire length of the flow. The amplitude of the velocity differences is of the order of 1-2 km s-1 over distances of about 300-400 AU. We interpret them as a result of outflow rotation. The sense of the outflow and disk rotation is the same. Infalling gas from a rotating molecular core cannot explain the observed velocity gradient within the flow. Magneto-centrifugal disk winds or photoevaporated disk winds can produce the observed rotational speeds if they are ejected from a Keplerian disk at radii of several tens of AU. Nevertheless, these slow winds ejected from large radii are not very massive, and cannot account for the observed linear momentum and angular momentum rates of the molecular flow. Thus, the observed flow is probably entrained material from the parent cloud. DG Tau B is a good laboratory to model in detail the entrainment process and see if it can account for the observed angular momentum. 
Fil: Zapata, Luis A.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Lizano, Susana. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Rodríguez, Luis F.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Ho, Paul T. P.. Harvard-smithsonian Center For Astrophysics; Estados Unidos
Fil: Loinard, Laurent. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Tafoya, Daniel. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Materia
Jets
Pre-Main Sequence (Estrellas)
Outflows
Taurus Molecular Cloud
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:11336/7728
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/7728
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jetZapata, Luis A.Lizano, SusanaRodríguez, Luis F.Ho, Paul T. P.Loinard, LaurentFernandez Lopez, ManuelTafoya, DanielJetsPre-Main Sequence (Estrellas)OutflowsTaurus Molecular Cloudhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present 12CO(2-1) line and 1300 μm continuum observations made with the Submillimeter Array of the young star DG Tau B. We find, in the continuum observations, emission arising from the circumstellar disk surrounding DG Tau B. The 12CO(2-1) line observations, on the other hand, revealed emission associated with the disk and the asymmetric outflow related with this source. Velocity asymmetries about the flow axis are found over the entire length of the flow. The amplitude of the velocity differences is of the order of 1-2 km s-1 over distances of about 300-400 AU. We interpret them as a result of outflow rotation. The sense of the outflow and disk rotation is the same. Infalling gas from a rotating molecular core cannot explain the observed velocity gradient within the flow. Magneto-centrifugal disk winds or photoevaporated disk winds can produce the observed rotational speeds if they are ejected from a Keplerian disk at radii of several tens of AU. Nevertheless, these slow winds ejected from large radii are not very massive, and cannot account for the observed linear momentum and angular momentum rates of the molecular flow. Thus, the observed flow is probably entrained material from the parent cloud. DG Tau B is a good laboratory to model in detail the entrainment process and see if it can account for the observed angular momentum. Fil: Zapata, Luis A.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; MéxicoFil: Lizano, Susana. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; MéxicoFil: Rodríguez, Luis F.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; MéxicoFil: Ho, Paul T. P.. Harvard-smithsonian Center For Astrophysics; Estados UnidosFil: Loinard, Laurent. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; MéxicoFil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto Argentino de Radioastronomia (i); ArgentinaFil: Tafoya, Daniel. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; MéxicoIop Publishing2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7728Zapata, Luis A. ; Lizano, Susana; Rodríguez, Luis F. ; Ho, Paul T. P. ; Loinard, Laurent ; et al.; Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet; Iop Publishing; Astrophysical Journal; 798; 2; 1-2015; 131-1380004-637Xenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/798/2/131info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/798/2/131info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1411.0173v1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:36:55Zoai:ri.conicet.gov.ar:11336/7728instacron: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 10:36:56.195CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
title Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
spellingShingle Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
Zapata, Luis A.
Jets
Pre-Main Sequence (Estrellas)
Outflows
Taurus Molecular Cloud
title_short Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
title_full Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
title_fullStr Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
title_full_unstemmed Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
title_sort Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet
dc.creator.none.fl_str_mv Zapata, Luis A.
Lizano, Susana
Rodríguez, Luis F.
Ho, Paul T. P.
Loinard, Laurent
Fernandez Lopez, Manuel
Tafoya, Daniel
author Zapata, Luis A.
author_facet Zapata, Luis A.
Lizano, Susana
Rodríguez, Luis F.
Ho, Paul T. P.
Loinard, Laurent
Fernandez Lopez, Manuel
Tafoya, Daniel
author_role author
author2 Lizano, Susana
Rodríguez, Luis F.
Ho, Paul T. P.
Loinard, Laurent
Fernandez Lopez, Manuel
Tafoya, Daniel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Jets
Pre-Main Sequence (Estrellas)
Outflows
Taurus Molecular Cloud
topic Jets
Pre-Main Sequence (Estrellas)
Outflows
Taurus Molecular Cloud
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present 12CO(2-1) line and 1300 μm continuum observations made with the Submillimeter Array of the young star DG Tau B. We find, in the continuum observations, emission arising from the circumstellar disk surrounding DG Tau B. The 12CO(2-1) line observations, on the other hand, revealed emission associated with the disk and the asymmetric outflow related with this source. Velocity asymmetries about the flow axis are found over the entire length of the flow. The amplitude of the velocity differences is of the order of 1-2 km s-1 over distances of about 300-400 AU. We interpret them as a result of outflow rotation. The sense of the outflow and disk rotation is the same. Infalling gas from a rotating molecular core cannot explain the observed velocity gradient within the flow. Magneto-centrifugal disk winds or photoevaporated disk winds can produce the observed rotational speeds if they are ejected from a Keplerian disk at radii of several tens of AU. Nevertheless, these slow winds ejected from large radii are not very massive, and cannot account for the observed linear momentum and angular momentum rates of the molecular flow. Thus, the observed flow is probably entrained material from the parent cloud. DG Tau B is a good laboratory to model in detail the entrainment process and see if it can account for the observed angular momentum. 
Fil: Zapata, Luis A.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Lizano, Susana. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Rodríguez, Luis F.. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Ho, Paul T. P.. Harvard-smithsonian Center For Astrophysics; Estados Unidos
Fil: Loinard, Laurent. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
Fil: Fernandez Lopez, Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto Argentino de Radioastronomia (i); Argentina
Fil: Tafoya, Daniel. Universidad Autónoma de México. Centro de Radioastronomia y Astrofisica; México
description We present 12CO(2-1) line and 1300 μm continuum observations made with the Submillimeter Array of the young star DG Tau B. We find, in the continuum observations, emission arising from the circumstellar disk surrounding DG Tau B. The 12CO(2-1) line observations, on the other hand, revealed emission associated with the disk and the asymmetric outflow related with this source. Velocity asymmetries about the flow axis are found over the entire length of the flow. The amplitude of the velocity differences is of the order of 1-2 km s-1 over distances of about 300-400 AU. We interpret them as a result of outflow rotation. The sense of the outflow and disk rotation is the same. Infalling gas from a rotating molecular core cannot explain the observed velocity gradient within the flow. Magneto-centrifugal disk winds or photoevaporated disk winds can produce the observed rotational speeds if they are ejected from a Keplerian disk at radii of several tens of AU. Nevertheless, these slow winds ejected from large radii are not very massive, and cannot account for the observed linear momentum and angular momentum rates of the molecular flow. Thus, the observed flow is probably entrained material from the parent cloud. DG Tau B is a good laboratory to model in detail the entrainment process and see if it can account for the observed angular momentum. 
publishDate 2015
dc.date.none.fl_str_mv 2015-01
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/11336/7728
Zapata, Luis A. ; Lizano, Susana; Rodríguez, Luis F. ; Ho, Paul T. P. ; Loinard, Laurent ; et al.; Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet; Iop Publishing; Astrophysical Journal; 798; 2; 1-2015; 131-138
0004-637X
url http://hdl.handle.net/11336/7728
identifier_str_mv Zapata, Luis A. ; Lizano, Susana; Rodríguez, Luis F. ; Ho, Paul T. P. ; Loinard, Laurent ; et al.; Kinematics of the outflow from the young star DG Tau B: rotation in the vicinities of an optical jet; Iop Publishing; Astrophysical Journal; 798; 2; 1-2015; 131-138
0004-637X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-637X/798/2/131
info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-637X/798/2/131
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/1411.0173v1
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 Iop Publishing
publisher.none.fl_str_mv Iop Publishing
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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