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dc.contributor.author
Duronea, Nicolas Urbano
dc.contributor.author
Arnal, Edmundo Marcelo
dc.contributor.author
Bronfman, L.
dc.date.available
2016-02-11T13:47:04Z
dc.date.issued
2013-03
dc.identifier.citation
Duronea, Nicolas Urbano; Arnal, Edmundo Marcelo; Bronfman, L.; Carbon monoxide in the environs of the star WR16; EDP Sciences; Astronomy and Astrophysics; 551; 3-2013; 71-79
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/4129
dc.description.abstract
Aims. We analyze the carbon monoxide emission around the star WR 16 aiming to study the physical characteristics of the molecular gas linked to the star and to achieve a better understanding of the interaction between massive stars with their surroundings. Methods. We study the molecular gas in a region in size using CO J = 1 → 0 and 13CO J = 1 → 0 line data obtained with the 4-m NANTEN telescope. Radio continuum archival data at 4.85 GHz, obtained from the Parkes-MIT-NRAO Southern Radio Survey, are also analyzed to account for the ionized gas. Available IRAS (HIRES) 60 μm and 100 μm images are used to study the characteristics of the dust around the star. Results. Our new CO and 13CO data allow the low/intermediate density molecular gas surrounding the WR nebula to be completely mapped. We report two molecular features at −5 km s-1 and −8.5 km s-1 (components 1 and 2, respectively) having a good morphological resemblance with the Hα emission of the ring nebula. Component 2 seems to be associated with the external ring, while component 1 is placed at the interface between component 2 and the Hα emission. We also report a third molecular feature ~10′ in size (component 3) at a velocity of −9.5 km s-1 having a good morphological correspondence with the inner optical and IR emission, although high resolution observations are recommended to confirm its existence. The stratified morphology and kinematics of the molecular gas could be associated to shock fronts and high mass-loss events related to different evolutive phases of the WR star, which have acted upon the surrounding circumstellar molecular gas. An analysis of the mass of component 1 suggests that this feature is composed of swept-up interstellar gas and is probably enriched by molecular ejecta. The direction of the proper motion of WR 16 suggests that the morphology observed at infrared, optical, radio continuum, and probably molecular emission of the inner ring nebula is induced by the stellar motion.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Molecular Data
dc.subject
Wolf-Rayet Stars
dc.subject
Ism: Molecules
dc.subject
Interstellar Medium
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Carbon monoxide in the environs of the star WR16
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
551
dc.journal.pagination
71-79
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.conicet.avisoEditorial
Reproduced with permission from Astronomy & Astrophysics, © ESO
dc.description.fil
Fil: Duronea, Nicolas Urbano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto Argentino de Radioastronomia (i); Argentina. Universidad de Chile. Departamento de Astronomía; Chile
dc.description.fil
Fil: Arnal, Edmundo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto Argentino de Radioastronomia (i); Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil
Fil: Bronfman, L.. Universidad de Chile. Departamento de Astronomía; Chile
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201219816
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2013/03/aa19816-12/aa19816-12.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/ark/1212.1335
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1212.1335


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