New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind

Autores
Contreras, M. E.; Rodríguez, L. F.; Arnal, Edmundo Marcelo
Año de publicación
2000
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The interaction between a stellar wind and its surrounding ISM can create H I cavities or bubbles. In particular, WR 6 shows a very large ovoidal H I bubble around it, whose shape cannot be explained in terms of the standard interstellar bubble theory, and may require an anisotropic stellar wind. In this paper, we have studied this possibility using new 3.6-cm VLA observations. We found no firm evidence supporting the possibility that WR 6 has a strongly anisotropic wind and conclude that our data are consistent with an isotropic wind. Under this assumption we have determined the source size, its brightness temperature and its mass loss rate. Comparing our four flux densities obtained over approximately 6 months, we found no evidence of large variability (<= 15%). It has also been proposed that WR 6 could be a WR+c binary, but the observed radio characteristics do not support this hypothesis.
Fil: Contreras, M. E.. Universidad Nacional Autónoma de México; México
Fil: Rodríguez, L. F.. Universidad Nacional Autónoma de México; México
Fil: Arnal, Edmundo Marcelo. 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
Materia
Interstellar bubbles
Interstellar medium
Wolf rayet stars
Neutral hydrogen
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:11336/31636
Acceder
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network_name_str CONICET Digital (CONICET)
spelling New VLA observations of WR 6 (= HR 50896): a search for an anisotropic windContreras, M. E.Rodríguez, L. F.Arnal, Edmundo MarceloInterstellar bubblesInterstellar mediumWolf rayet starsNeutral hydrogenhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The interaction between a stellar wind and its surrounding ISM can create H I cavities or bubbles. In particular, WR 6 shows a very large ovoidal H I bubble around it, whose shape cannot be explained in terms of the standard interstellar bubble theory, and may require an anisotropic stellar wind. In this paper, we have studied this possibility using new 3.6-cm VLA observations. We found no firm evidence supporting the possibility that WR 6 has a strongly anisotropic wind and conclude that our data are consistent with an isotropic wind. Under this assumption we have determined the source size, its brightness temperature and its mass loss rate. Comparing our four flux densities obtained over approximately 6 months, we found no evidence of large variability (<= 15%). It has also been proposed that WR 6 could be a WR+c binary, but the observed radio characteristics do not support this hypothesis.Fil: Contreras, M. E.. Universidad Nacional Autónoma de México; MéxicoFil: Rodríguez, L. F.. Universidad Nacional Autónoma de México; MéxicoFil: Arnal, Edmundo Marcelo. 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; ArgentinaUniversidad Nacional Autónoma de México. Instituto de Astronomía2000-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/31636Rodríguez, L. F.; Contreras, M. E.; Arnal, Edmundo Marcelo; New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind; Universidad Nacional Autónoma de México. Instituto de Astronomía; Revista Mexicana de Astronomía y Astrofísica; 36; 6-2000; 135-1390185-1101CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://articles.adsabs.harvard.edu/full/2000RMxAA..36..135Cinfo:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2000RMxAA..36..135Cinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:32:28Zoai:ri.conicet.gov.ar:11336/31636instacron: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 09:32:28.914CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
title New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
spellingShingle New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
Contreras, M. E.
Interstellar bubbles
Interstellar medium
Wolf rayet stars
Neutral hydrogen
title_short New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
title_full New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
title_fullStr New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
title_full_unstemmed New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
title_sort New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind
dc.creator.none.fl_str_mv Contreras, M. E.
Rodríguez, L. F.
Arnal, Edmundo Marcelo
author Contreras, M. E.
author_facet Contreras, M. E.
Rodríguez, L. F.
Arnal, Edmundo Marcelo
author_role author
author2 Rodríguez, L. F.
Arnal, Edmundo Marcelo
author2_role author
author
dc.subject.none.fl_str_mv Interstellar bubbles
Interstellar medium
Wolf rayet stars
Neutral hydrogen
topic Interstellar bubbles
Interstellar medium
Wolf rayet stars
Neutral hydrogen
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The interaction between a stellar wind and its surrounding ISM can create H I cavities or bubbles. In particular, WR 6 shows a very large ovoidal H I bubble around it, whose shape cannot be explained in terms of the standard interstellar bubble theory, and may require an anisotropic stellar wind. In this paper, we have studied this possibility using new 3.6-cm VLA observations. We found no firm evidence supporting the possibility that WR 6 has a strongly anisotropic wind and conclude that our data are consistent with an isotropic wind. Under this assumption we have determined the source size, its brightness temperature and its mass loss rate. Comparing our four flux densities obtained over approximately 6 months, we found no evidence of large variability (<= 15%). It has also been proposed that WR 6 could be a WR+c binary, but the observed radio characteristics do not support this hypothesis.
Fil: Contreras, M. E.. Universidad Nacional Autónoma de México; México
Fil: Rodríguez, L. F.. Universidad Nacional Autónoma de México; México
Fil: Arnal, Edmundo Marcelo. 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
description The interaction between a stellar wind and its surrounding ISM can create H I cavities or bubbles. In particular, WR 6 shows a very large ovoidal H I bubble around it, whose shape cannot be explained in terms of the standard interstellar bubble theory, and may require an anisotropic stellar wind. In this paper, we have studied this possibility using new 3.6-cm VLA observations. We found no firm evidence supporting the possibility that WR 6 has a strongly anisotropic wind and conclude that our data are consistent with an isotropic wind. Under this assumption we have determined the source size, its brightness temperature and its mass loss rate. Comparing our four flux densities obtained over approximately 6 months, we found no evidence of large variability (<= 15%). It has also been proposed that WR 6 could be a WR+c binary, but the observed radio characteristics do not support this hypothesis.
publishDate 2000
dc.date.none.fl_str_mv 2000-06
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/11336/31636
Rodríguez, L. F.; Contreras, M. E.; Arnal, Edmundo Marcelo; New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind; Universidad Nacional Autónoma de México. Instituto de Astronomía; Revista Mexicana de Astronomía y Astrofísica; 36; 6-2000; 135-139
0185-1101
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31636
identifier_str_mv Rodríguez, L. F.; Contreras, M. E.; Arnal, Edmundo Marcelo; New VLA observations of WR 6 (= HR 50896): a search for an anisotropic wind; Universidad Nacional Autónoma de México. Instituto de Astronomía; Revista Mexicana de Astronomía y Astrofísica; 36; 6-2000; 135-139
0185-1101
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://articles.adsabs.harvard.edu/full/2000RMxAA..36..135C
info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2000RMxAA..36..135C
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
application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México. Instituto de Astronomía
publisher.none.fl_str_mv Universidad Nacional Autónoma de México. Instituto de Astronomía
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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