Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions

Context. The bright-rimmed cloud IC 1396N is believed to host one of the few known cases where two bipolar CO outflows driven by young stellar objects collide. The CO outflows are traced by chains of knots of H2 emission, with enhanced emission at the position of the possible collision. Aims. The ai...

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Detalles Bibliográficos
Autores: López Hermoso, Rosario, Estalella, Robert, Beltrán, Maria T., Massi, Fabrizio, Acosta-Pulido José A., Girart, Josep M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/188751
Acceso en línea:https://hdl.handle.net/2445/188751
Access Level:acceso abierto
Palabra clave:Jets (Astrofísica)
Estels
Astrophysical jets
Stars
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repository_id_str
spelling Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motionsLópez Hermoso, RosarioEstalella, RobertBeltrán, Maria T.Massi, FabrizioAcosta-Pulido José A.Girart, Josep M.Jets (Astrofísica)EstelsAstrophysical jetsStarsContext. The bright-rimmed cloud IC 1396N is believed to host one of the few known cases where two bipolar CO outflows driven by young stellar objects collide. The CO outflows are traced by chains of knots of H2 emission, with enhanced emission at the position of the possible collision. Aims. The aim of this work is to use the proper motions of the H2 knots to confirm the collision scenario. Methods. A second-epoch H2 image was obtained, and the proper motions of the knots were determined with a time baseline of ∼11 yr. We also performed differential photometry on the images to check the flux variability of the knots. Results. For each outflow (N and S), we classified the knots as pre-collision or post-collision. The axes of the pre-collision knots, the position of the possible collision point, and the axes of the post-collision knots were estimated. The difference between the proper motion direction of the post-collision knots and the position angle from the collision point was also calculated. For some of the knots, we obtained the 3D velocity using the radial velocity derived from H2 spectra. Conclusions. The velocity pattern of the H2 knots in the area of interaction (post-collision knots) shows a deviation from that of the pre-collision knots, consistent with being a consequence of the interaction between the two outflows. This favours the interpretation of the IC 1396N outflows as a true collision between two protostellar jets instead of a projection effect.EDP Sciences2022202220222022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion11 p.application/pdfhttps://hdl.handle.net/2445/188751Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1051/0004-6361/202243380Astronomy & Astrophysics, 2022, vol. 1, num. 661, p. 106-116https://doi.org/10.1051/0004-6361/202243380(c) The European Southern Observatory (ESO), 2022info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1887512026-05-29T05:05:01Z
dc.title.none.fl_str_mv Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
title Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
spellingShingle Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
López Hermoso, Rosario
Jets (Astrofísica)
Estels
Astrophysical jets
Stars
title_short Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
title_full Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
title_fullStr Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
title_full_unstemmed Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
title_sort Collision of protostellar jets in the star-forming region IC 1396N: Analysis of knot proper motions
dc.creator.none.fl_str_mv López Hermoso, Rosario
Estalella, Robert
Beltrán, Maria T.
Massi, Fabrizio
Acosta-Pulido José A.
Girart, Josep M.
author López Hermoso, Rosario
author_facet López Hermoso, Rosario
Estalella, Robert
Beltrán, Maria T.
Massi, Fabrizio
Acosta-Pulido José A.
Girart, Josep M.
author_role author
author2 Estalella, Robert
Beltrán, Maria T.
Massi, Fabrizio
Acosta-Pulido José A.
Girart, Josep M.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Jets (Astrofísica)
Estels
Astrophysical jets
Stars
topic Jets (Astrofísica)
Estels
Astrophysical jets
Stars
description Context. The bright-rimmed cloud IC 1396N is believed to host one of the few known cases where two bipolar CO outflows driven by young stellar objects collide. The CO outflows are traced by chains of knots of H2 emission, with enhanced emission at the position of the possible collision. Aims. The aim of this work is to use the proper motions of the H2 knots to confirm the collision scenario. Methods. A second-epoch H2 image was obtained, and the proper motions of the knots were determined with a time baseline of ∼11 yr. We also performed differential photometry on the images to check the flux variability of the knots. Results. For each outflow (N and S), we classified the knots as pre-collision or post-collision. The axes of the pre-collision knots, the position of the possible collision point, and the axes of the post-collision knots were estimated. The difference between the proper motion direction of the post-collision knots and the position angle from the collision point was also calculated. For some of the knots, we obtained the 3D velocity using the radial velocity derived from H2 spectra. Conclusions. The velocity pattern of the H2 knots in the area of interaction (post-collision knots) shows a deviation from that of the pre-collision knots, consistent with being a consequence of the interaction between the two outflows. This favours the interpretation of the IC 1396N outflows as a true collision between two protostellar jets instead of a projection effect.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/188751
url https://hdl.handle.net/2445/188751
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1051/0004-6361/202243380
Astronomy & Astrophysics, 2022, vol. 1, num. 661, p. 106-116
https://doi.org/10.1051/0004-6361/202243380
dc.rights.none.fl_str_mv (c) The European Southern Observatory (ESO), 2022
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The European Southern Observatory (ESO), 2022
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 11 p.
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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