An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155

Autores
Cichowolski, Silvina; Arnal, Edmundo Marcelo
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The neutral hydrogen distribution has been studied in the direction of three Galactic Wolf-Rayet (WR) stars using the 100 m Effelsberg radio telescope. Cavities in the HI distribution, regions of low HI emissivity, are observed over a 8-9 km s-1 velocity range for WR 126 (≡ST 2), WR 154 (≡HD 213049) and WR 155 (≡HD 214419). These minima are interpreted as the observable 21-cm HI line counterpart of interstellar bubbles created by the winds of the WR stars and their progenitors. The HI cavities are elongated structures depicting an axial ratio ranging from 1.3 (WR 155) to 3 (WR 126). The WR stars are always eccentric with respect to either the geometric centre of the HI cavity or the absolute minimum inside it. This offset ranges from 50% to 80% of the HI hole's minor axis. The major axis of these structures range from 13 (WR 155) to 27 pc (WR 126), while the missing HI mass amounts to 45-50 M⊙ (WR 126), 60 M⊙ (WR 155) and 85 M⊙ (WR 154).
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía
Materia
Ciencias Astronómicas
ISM: bubbles
Stars: individual: WR 126, WR 154, WR 155
Stars: Worlf-Rayet
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/84793
Acceder
id SEDICI_8b3c068644419c182c182e1786e67a66
oai_identifier_str oai:sedici.unlp.edu.ar:10915/84793
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155Cichowolski, SilvinaArnal, Edmundo MarceloCiencias AstronómicasISM: bubblesStars: individual: WR 126, WR 154, WR 155Stars: Worlf-RayetThe neutral hydrogen distribution has been studied in the direction of three Galactic Wolf-Rayet (WR) stars using the 100 m Effelsberg radio telescope. Cavities in the HI distribution, regions of low HI emissivity, are observed over a 8-9 km s-1 velocity range for WR 126 (≡ST 2), WR 154 (≡HD 213049) and WR 155 (≡HD 214419). These minima are interpreted as the observable 21-cm HI line counterpart of interstellar bubbles created by the winds of the WR stars and their progenitors. The HI cavities are elongated structures depicting an axial ratio ranging from 1.3 (WR 155) to 3 (WR 126). The WR stars are always eccentric with respect to either the geometric centre of the HI cavity or the absolute minimum inside it. This offset ranges from 50% to 80% of the HI hole's minor axis. The major axis of these structures range from 13 (WR 155) to 27 pc (WR 126), while the missing HI mass amounts to 45-50 M⊙ (WR 126), 60 M⊙ (WR 155) and 85 M⊙ (WR 154).Facultad de Ciencias Astronómicas y GeofísicasInstituto Argentino de Radioastronomía2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf203-209http://sedici.unlp.edu.ar/handle/10915/84793enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20031620info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:15Zoai:sedici.unlp.edu.ar:10915/84793Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:15.433SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
title An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
spellingShingle An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
Cichowolski, Silvina
Ciencias Astronómicas
ISM: bubbles
Stars: individual: WR 126, WR 154, WR 155
Stars: Worlf-Rayet
title_short An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
title_full An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
title_fullStr An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
title_full_unstemmed An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
title_sort An Effelsberg HI study of the ISM around WR 126, WR 154 and WR 155
dc.creator.none.fl_str_mv Cichowolski, Silvina
Arnal, Edmundo Marcelo
author Cichowolski, Silvina
author_facet Cichowolski, Silvina
Arnal, Edmundo Marcelo
author_role author
author2 Arnal, Edmundo Marcelo
author2_role author
dc.subject.none.fl_str_mv Ciencias Astronómicas
ISM: bubbles
Stars: individual: WR 126, WR 154, WR 155
Stars: Worlf-Rayet
topic Ciencias Astronómicas
ISM: bubbles
Stars: individual: WR 126, WR 154, WR 155
Stars: Worlf-Rayet
dc.description.none.fl_txt_mv The neutral hydrogen distribution has been studied in the direction of three Galactic Wolf-Rayet (WR) stars using the 100 m Effelsberg radio telescope. Cavities in the HI distribution, regions of low HI emissivity, are observed over a 8-9 km s-1 velocity range for WR 126 (≡ST 2), WR 154 (≡HD 213049) and WR 155 (≡HD 214419). These minima are interpreted as the observable 21-cm HI line counterpart of interstellar bubbles created by the winds of the WR stars and their progenitors. The HI cavities are elongated structures depicting an axial ratio ranging from 1.3 (WR 155) to 3 (WR 126). The WR stars are always eccentric with respect to either the geometric centre of the HI cavity or the absolute minimum inside it. This offset ranges from 50% to 80% of the HI hole's minor axis. The major axis of these structures range from 13 (WR 155) to 27 pc (WR 126), while the missing HI mass amounts to 45-50 M⊙ (WR 126), 60 M⊙ (WR 155) and 85 M⊙ (WR 154).
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía
description The neutral hydrogen distribution has been studied in the direction of three Galactic Wolf-Rayet (WR) stars using the 100 m Effelsberg radio telescope. Cavities in the HI distribution, regions of low HI emissivity, are observed over a 8-9 km s-1 velocity range for WR 126 (≡ST 2), WR 154 (≡HD 213049) and WR 155 (≡HD 214419). These minima are interpreted as the observable 21-cm HI line counterpart of interstellar bubbles created by the winds of the WR stars and their progenitors. The HI cavities are elongated structures depicting an axial ratio ranging from 1.3 (WR 155) to 3 (WR 126). The WR stars are always eccentric with respect to either the geometric centre of the HI cavity or the absolute minimum inside it. This offset ranges from 50% to 80% of the HI hole's minor axis. The major axis of these structures range from 13 (WR 155) to 27 pc (WR 126), while the missing HI mass amounts to 45-50 M⊙ (WR 126), 60 M⊙ (WR 155) and 85 M⊙ (WR 154).
publishDate 2004
dc.date.none.fl_str_mv 2004
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/84793
url http://sedici.unlp.edu.ar/handle/10915/84793
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20031620
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
203-209
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 13.070432

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