Observational constraints on the HD5980 wind-wind collision

Autores
Koenigsberger, Gloria; Morrell, Nidia Irene; Hillier, D. John; Schmutz, Werner; Gamen, Roberto Claudio; Arias, Julia Inés; Barbá, Rodolfo Héctor; Ferrero Sosa, Gabriel Antonio
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Analysis of spectral line profi le variations observed over 6 decades in theWolf- Rayet system HD5980 lead to the conclusion that Star A, the variable member of the system, has always dominated the wind collision zone (WCZ), contrary to suggestions that before 1994 the stronger wind belonged to its close companion, Star B.The observed variations are caused by a combination of physical occultations, wind eclipses and emission and absorption originating in the WCZ. The effects caused by the leading WCZ branch, which folds around Star B, are clearly seen as it crosses our line of sight to Star A during the secondary eclipse. These effects can inform on the WCZ velocity and density structures. We speculate that differences in line pro les at the same orbital phase but at dfiferent epochs may be linked to changes in the WCZ radiative properties. The 2017-2020 spectra indicate that HD5980 was in a higher activity state than during 2010-2015.
Se presentan observaciones recientes del sistema múltiple HD5980 ubicado en la Nube Menor de Magallanes que se complementan con los resultados de observaciones efectuadas desde los años 1950s. Encontramos que la componente Star A, que actualmente posee el espectro dominante tipo Wolf-Rayet, siempre ha sido la estrella con el viento mas intenso. Las variaciones en los per les de líneas en emisión se explican con una combinación de los siguientes procesos: eclipses atmosféricos, emisión y absorción proveniente de la zona de interacción de los vientos, y ocultamiento de regiones de esta misma zona. Las observaciones de 2017-2020 indican un incremento en el nivel de actividad comparado con los años 2010-2015.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
Materia
Astronomía
binaries: eclipsing
stars: evolution
stars: mass-loss
stars: winds, out ows
stars: Wolf-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:10915/179670
Acceder
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network_name_str SEDICI (UNLP)
spelling Observational constraints on the HD5980 wind-wind collisionKoenigsberger, GloriaMorrell, Nidia IreneHillier, D. JohnSchmutz, WernerGamen, Roberto ClaudioArias, Julia InésBarbá, Rodolfo HéctorFerrero Sosa, Gabriel AntonioAstronomíabinaries: eclipsingstars: evolutionstars: mass-lossstars: winds, out owsstars: Wolf-RayetAnalysis of spectral line profi le variations observed over 6 decades in theWolf- Rayet system HD5980 lead to the conclusion that Star A, the variable member of the system, has always dominated the wind collision zone (WCZ), contrary to suggestions that before 1994 the stronger wind belonged to its close companion, Star B.The observed variations are caused by a combination of physical occultations, wind eclipses and emission and absorption originating in the WCZ. The effects caused by the leading WCZ branch, which folds around Star B, are clearly seen as it crosses our line of sight to Star A during the secondary eclipse. These effects can inform on the WCZ velocity and density structures. We speculate that differences in line pro les at the same orbital phase but at dfiferent epochs may be linked to changes in the WCZ radiative properties. The 2017-2020 spectra indicate that HD5980 was in a higher activity state than during 2010-2015.Se presentan observaciones recientes del sistema múltiple HD5980 ubicado en la Nube Menor de Magallanes que se complementan con los resultados de observaciones efectuadas desde los años 1950s. Encontramos que la componente Star A, que actualmente posee el espectro dominante tipo Wolf-Rayet, siempre ha sido la estrella con el viento mas intenso. Las variaciones en los per les de líneas en emisión se explican con una combinación de los siguientes procesos: eclipses atmosféricos, emisión y absorción proveniente de la zona de interacción de los vientos, y ocultamiento de regiones de esta misma zona. Las observaciones de 2017-2020 indican un incremento en el nivel de actividad comparado con los años 2010-2015.Facultad de Ciencias Astronómicas y GeofísicasInstituto de Astrofísica de La Plata2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf403-441http://sedici.unlp.edu.ar/handle/10915/179670enginfo:eu-repo/semantics/altIdentifier/doi/10.22201/ia.01851101p.2022.58.02.19info: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:UNLP2025-09-10T12:51:48Zoai:sedici.unlp.edu.ar:10915/179670Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-10 12:51:48.768SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Observational constraints on the HD5980 wind-wind collision
title Observational constraints on the HD5980 wind-wind collision
spellingShingle Observational constraints on the HD5980 wind-wind collision
Koenigsberger, Gloria
Astronomía
binaries: eclipsing
stars: evolution
stars: mass-loss
stars: winds, out ows
stars: Wolf-Rayet
title_short Observational constraints on the HD5980 wind-wind collision
title_full Observational constraints on the HD5980 wind-wind collision
title_fullStr Observational constraints on the HD5980 wind-wind collision
title_full_unstemmed Observational constraints on the HD5980 wind-wind collision
title_sort Observational constraints on the HD5980 wind-wind collision
dc.creator.none.fl_str_mv Koenigsberger, Gloria
Morrell, Nidia Irene
Hillier, D. John
Schmutz, Werner
Gamen, Roberto Claudio
Arias, Julia Inés
Barbá, Rodolfo Héctor
Ferrero Sosa, Gabriel Antonio
author Koenigsberger, Gloria
author_facet Koenigsberger, Gloria
Morrell, Nidia Irene
Hillier, D. John
Schmutz, Werner
Gamen, Roberto Claudio
Arias, Julia Inés
Barbá, Rodolfo Héctor
Ferrero Sosa, Gabriel Antonio
author_role author
author2 Morrell, Nidia Irene
Hillier, D. John
Schmutz, Werner
Gamen, Roberto Claudio
Arias, Julia Inés
Barbá, Rodolfo Héctor
Ferrero Sosa, Gabriel Antonio
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Astronomía
binaries: eclipsing
stars: evolution
stars: mass-loss
stars: winds, out ows
stars: Wolf-Rayet
topic Astronomía
binaries: eclipsing
stars: evolution
stars: mass-loss
stars: winds, out ows
stars: Wolf-Rayet
dc.description.none.fl_txt_mv Analysis of spectral line profi le variations observed over 6 decades in theWolf- Rayet system HD5980 lead to the conclusion that Star A, the variable member of the system, has always dominated the wind collision zone (WCZ), contrary to suggestions that before 1994 the stronger wind belonged to its close companion, Star B.The observed variations are caused by a combination of physical occultations, wind eclipses and emission and absorption originating in the WCZ. The effects caused by the leading WCZ branch, which folds around Star B, are clearly seen as it crosses our line of sight to Star A during the secondary eclipse. These effects can inform on the WCZ velocity and density structures. We speculate that differences in line pro les at the same orbital phase but at dfiferent epochs may be linked to changes in the WCZ radiative properties. The 2017-2020 spectra indicate that HD5980 was in a higher activity state than during 2010-2015.
Se presentan observaciones recientes del sistema múltiple HD5980 ubicado en la Nube Menor de Magallanes que se complementan con los resultados de observaciones efectuadas desde los años 1950s. Encontramos que la componente Star A, que actualmente posee el espectro dominante tipo Wolf-Rayet, siempre ha sido la estrella con el viento mas intenso. Las variaciones en los per les de líneas en emisión se explican con una combinación de los siguientes procesos: eclipses atmosféricos, emisión y absorción proveniente de la zona de interacción de los vientos, y ocultamiento de regiones de esta misma zona. Las observaciones de 2017-2020 indican un incremento en el nivel de actividad comparado con los años 2010-2015.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto de Astrofísica de La Plata
description Analysis of spectral line profi le variations observed over 6 decades in theWolf- Rayet system HD5980 lead to the conclusion that Star A, the variable member of the system, has always dominated the wind collision zone (WCZ), contrary to suggestions that before 1994 the stronger wind belonged to its close companion, Star B.The observed variations are caused by a combination of physical occultations, wind eclipses and emission and absorption originating in the WCZ. The effects caused by the leading WCZ branch, which folds around Star B, are clearly seen as it crosses our line of sight to Star A during the secondary eclipse. These effects can inform on the WCZ velocity and density structures. We speculate that differences in line pro les at the same orbital phase but at dfiferent epochs may be linked to changes in the WCZ radiative properties. The 2017-2020 spectra indicate that HD5980 was in a higher activity state than during 2010-2015.
publishDate 2022
dc.date.none.fl_str_mv 2022
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/10915/179670
url http://sedici.unlp.edu.ar/handle/10915/179670
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.22201/ia.01851101p.2022.58.02.19
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
403-441
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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