The sudden appearance of CO emission in LHA 115-S 65

Autores
Oksala, M. E.; Kraus, M.; Arias, María Laura; Borges Fernandes, M.; Cidale, Lydia Sonia; Muratore, María Florencia; Curé, M.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Molecular emission has been detected in several Magellanic Cloud B[e] supergiants. In this Letter, we report on the detection of CO band head emission in the B[e] supergiant LHA 115-S 65, and present a K-band near-infrared spectrum obtained with the Spectrograph for INtegral Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 telescope. The observed molecular band head emission in S65 is quite surprising in the light of a previous non-detection by McGregor, Hyland & McGinn, as well as a high-resolution (R = 50 000) Gemini/Phoenix spectrum of this star taken nine months earlier showing no emission. Based on analysis of the optical spectrum by Kraus, Borges Fernandes & de Aráujo, we suspect that the sudden appearance of molecular emission could be due to density buildup in an outflowing viscous disc, as seen for Be stars. This new discovery, combined with variability in two other similar evolved massive stars, indicates an evolutionary link between B[e] supergiants and luminous blue variables.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Be
Circumstellar matter
Outflows
Stars: emission-line
Stars: individual: LHA115-S 65
Stars: winds
Supergiants
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:10915/84628
Acceder
id SEDICI_ef2d0152972058a76407d0bad468b004
oai_identifier_str oai:sedici.unlp.edu.ar:10915/84628
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The sudden appearance of CO emission in LHA 115-S 65Oksala, M. E.Kraus, M.Arias, María LauraBorges Fernandes, M.Cidale, Lydia SoniaMuratore, María FlorenciaCuré, M.Ciencias AstronómicasBeCircumstellar matterOutflowsStars: emission-lineStars: individual: LHA115-S 65Stars: windsSupergiantsMolecular emission has been detected in several Magellanic Cloud B[e] supergiants. In this Letter, we report on the detection of CO band head emission in the B[e] supergiant LHA 115-S 65, and present a K-band near-infrared spectrum obtained with the Spectrograph for INtegral Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 telescope. The observed molecular band head emission in S65 is quite surprising in the light of a previous non-detection by McGregor, Hyland & McGinn, as well as a high-resolution (R = 50 000) Gemini/Phoenix spectrum of this star taken nine months earlier showing no emission. Based on analysis of the optical spectrum by Kraus, Borges Fernandes & de Aráujo, we suspect that the sudden appearance of molecular emission could be due to density buildup in an outflowing viscous disc, as seen for Be stars. This new discovery, combined with variability in two other similar evolved massive stars, indicates an evolutionary link between B[e] supergiants and luminous blue variables.Facultad de Ciencias Astronómicas y Geofísicas2012-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfL56-L60http://sedici.unlp.edu.ar/handle/10915/84628enginfo:eu-repo/semantics/altIdentifier/issn/1745-3925info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2012.01323.xinfo: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:UNLP2025-09-29T11:16:01Zoai:sedici.unlp.edu.ar:10915/84628Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:01.51SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The sudden appearance of CO emission in LHA 115-S 65
title The sudden appearance of CO emission in LHA 115-S 65
spellingShingle The sudden appearance of CO emission in LHA 115-S 65
Oksala, M. E.
Ciencias Astronómicas
Be
Circumstellar matter
Outflows
Stars: emission-line
Stars: individual: LHA115-S 65
Stars: winds
Supergiants
title_short The sudden appearance of CO emission in LHA 115-S 65
title_full The sudden appearance of CO emission in LHA 115-S 65
title_fullStr The sudden appearance of CO emission in LHA 115-S 65
title_full_unstemmed The sudden appearance of CO emission in LHA 115-S 65
title_sort The sudden appearance of CO emission in LHA 115-S 65
dc.creator.none.fl_str_mv Oksala, M. E.
Kraus, M.
Arias, María Laura
Borges Fernandes, M.
Cidale, Lydia Sonia
Muratore, María Florencia
Curé, M.
author Oksala, M. E.
author_facet Oksala, M. E.
Kraus, M.
Arias, María Laura
Borges Fernandes, M.
Cidale, Lydia Sonia
Muratore, María Florencia
Curé, M.
author_role author
author2 Kraus, M.
Arias, María Laura
Borges Fernandes, M.
Cidale, Lydia Sonia
Muratore, María Florencia
Curé, M.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Be
Circumstellar matter
Outflows
Stars: emission-line
Stars: individual: LHA115-S 65
Stars: winds
Supergiants
topic Ciencias Astronómicas
Be
Circumstellar matter
Outflows
Stars: emission-line
Stars: individual: LHA115-S 65
Stars: winds
Supergiants
dc.description.none.fl_txt_mv Molecular emission has been detected in several Magellanic Cloud B[e] supergiants. In this Letter, we report on the detection of CO band head emission in the B[e] supergiant LHA 115-S 65, and present a K-band near-infrared spectrum obtained with the Spectrograph for INtegral Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 telescope. The observed molecular band head emission in S65 is quite surprising in the light of a previous non-detection by McGregor, Hyland & McGinn, as well as a high-resolution (R = 50 000) Gemini/Phoenix spectrum of this star taken nine months earlier showing no emission. Based on analysis of the optical spectrum by Kraus, Borges Fernandes & de Aráujo, we suspect that the sudden appearance of molecular emission could be due to density buildup in an outflowing viscous disc, as seen for Be stars. This new discovery, combined with variability in two other similar evolved massive stars, indicates an evolutionary link between B[e] supergiants and luminous blue variables.
Facultad de Ciencias Astronómicas y Geofísicas
description Molecular emission has been detected in several Magellanic Cloud B[e] supergiants. In this Letter, we report on the detection of CO band head emission in the B[e] supergiant LHA 115-S 65, and present a K-band near-infrared spectrum obtained with the Spectrograph for INtegral Field Observation in the Near-Infrared (SINFONI; R = 4500) on the ESO VLT UT4 telescope. The observed molecular band head emission in S65 is quite surprising in the light of a previous non-detection by McGregor, Hyland & McGinn, as well as a high-resolution (R = 50 000) Gemini/Phoenix spectrum of this star taken nine months earlier showing no emission. Based on analysis of the optical spectrum by Kraus, Borges Fernandes & de Aráujo, we suspect that the sudden appearance of molecular emission could be due to density buildup in an outflowing viscous disc, as seen for Be stars. This new discovery, combined with variability in two other similar evolved massive stars, indicates an evolutionary link between B[e] supergiants and luminous blue variables.
publishDate 2012
dc.date.none.fl_str_mv 2012-10-01
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/10915/84628
url http://sedici.unlp.edu.ar/handle/10915/84628
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1745-3925
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1745-3933.2012.01323.x
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
L56-L60
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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