Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73.
- Autores
- Kraus, M.; Cidale, Lydia Sonia; Arias, María Laura; Maravelias, G.; Nickeler, D.; Torres, Andrea Fabiana; Borges Fernandes, M.; Aret, A.; Cure, M.; Vallverdú, R.; Barba, Rodolfo Hector
- Año de publicación
- 2016
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. B[e] supergiants are evolved massive stars, enshrouded in a dense wind and surrounded by a molecular and dusty disk. Themechanisms that drive phases of enhanced mass loss and mass ejections, responsible for the shaping of the circumstellar material ofthese objects, are still unclear.Aims. We aim to improve our knowledge on the structure and dynamics of the circumstellar disk of the Large Magellanic Cloud B[e]supergiant LHA 120-S 73.Methods. High-resolution optical and near-infrared spectroscopic data were obtained over a period of 16 and 7 years, respectively.The spectra cover the diagnostic emission lines from [Ca ii] and [O i], as well as the CO bands. These features trace the disk atdifferent distances from the star. We analyzed the kinematics of the individual emission regions by modeling their emission profiles.A low-resolution mid-infrared spectrum was obtained as well, which provides information on the composition of the dusty disk.Results. All diagnostic emission features display double-peaked line profiles, which we interpret as due to Keplerian rotation. We findthat the profile of each forbidden line contains contributions from two spatially clearly distinct rings. In total, we find that LHA 120-S 73 is surrounded by at least four individual rings of material with alternating densities (or by a disk with strongly non-monotonicradial density distribution). Moreover, we find that the molecular ring must have gaps or at least strong density inhomogeneities,or in other words, a clumpy structure. The optical spectra additionally display a broad emission feature at 6160?6180 Å, which weinterpret as molecular emission from TiO. The mid-infrared spectrum displays features of oxygen- and carbon-rich grain species,which indicates a long-lived, stable dusty disk.We cannot confirm the previously reported high value for the stellar rotation velocity. He i λ 5876 is the only clearly detectable pureatmospheric absorption line in our data. Its line profile is strongly variable in both width and shape and resembles of those seen innon-radially pulsating stars. A proper determination of the real underlying stellar rotation velocity is hence not possible.Conclusions. The existence of multiple stable and clumpy rings of alternating density recalls ring structures around planets. Althoughthere is currently insufficient observational evidence, it is tempting to propose a scenario with one (or more) minor bodies or planetsrevolving around LHA 120-S 73 and stabilizing the ring system, in analogy to the shepherd moons in planetary systems.
Fil: Kraus, M.. Astronomický ústav; República Checa
Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Arias, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Maravelias, G.. Astronomický ústav; República Checa
Fil: Nickeler, D.. Astronomický ústav; República Checa
Fil: Torres, Andrea Fabiana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil
Fil: Aret, A.. Tartu Observatory; Estonia
Fil: Cure, M.. Universidad de Valparaíso; Chile
Fil: Vallverdú, R.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina
Fil: Barba, Rodolfo Hector. Universidad de La Serena; Chile - Materia
-
Circumstellar matter
Infrared stars
Massive stars
LHA 120-S 73 (estrella)
Early type stars
Supergiant stars - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/37945
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/37945 |
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network_name_str |
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spelling |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73.Kraus, M.Cidale, Lydia SoniaArias, María LauraMaravelias, G.Nickeler, D.Torres, Andrea FabianaBorges Fernandes, M.Aret, A.Cure, M.Vallverdú, R.Barba, Rodolfo HectorCircumstellar matterInfrared starsMassive starsLHA 120-S 73 (estrella)Early type starsSupergiant starshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. B[e] supergiants are evolved massive stars, enshrouded in a dense wind and surrounded by a molecular and dusty disk. Themechanisms that drive phases of enhanced mass loss and mass ejections, responsible for the shaping of the circumstellar material ofthese objects, are still unclear.Aims. We aim to improve our knowledge on the structure and dynamics of the circumstellar disk of the Large Magellanic Cloud B[e]supergiant LHA 120-S 73.Methods. High-resolution optical and near-infrared spectroscopic data were obtained over a period of 16 and 7 years, respectively.The spectra cover the diagnostic emission lines from [Ca ii] and [O i], as well as the CO bands. These features trace the disk atdifferent distances from the star. We analyzed the kinematics of the individual emission regions by modeling their emission profiles.A low-resolution mid-infrared spectrum was obtained as well, which provides information on the composition of the dusty disk.Results. All diagnostic emission features display double-peaked line profiles, which we interpret as due to Keplerian rotation. We findthat the profile of each forbidden line contains contributions from two spatially clearly distinct rings. In total, we find that LHA 120-S 73 is surrounded by at least four individual rings of material with alternating densities (or by a disk with strongly non-monotonicradial density distribution). Moreover, we find that the molecular ring must have gaps or at least strong density inhomogeneities,or in other words, a clumpy structure. The optical spectra additionally display a broad emission feature at 6160?6180 Å, which weinterpret as molecular emission from TiO. The mid-infrared spectrum displays features of oxygen- and carbon-rich grain species,which indicates a long-lived, stable dusty disk.We cannot confirm the previously reported high value for the stellar rotation velocity. He i λ 5876 is the only clearly detectable pureatmospheric absorption line in our data. Its line profile is strongly variable in both width and shape and resembles of those seen innon-radially pulsating stars. A proper determination of the real underlying stellar rotation velocity is hence not possible.Conclusions. The existence of multiple stable and clumpy rings of alternating density recalls ring structures around planets. Althoughthere is currently insufficient observational evidence, it is tempting to propose a scenario with one (or more) minor bodies or planetsrevolving around LHA 120-S 73 and stabilizing the ring system, in analogy to the shepherd moons in planetary systems.Fil: Kraus, M.. Astronomický ústav; República ChecaFil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Arias, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Maravelias, G.. Astronomický ústav; República ChecaFil: Nickeler, D.. Astronomický ústav; República ChecaFil: Torres, Andrea Fabiana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Aret, A.. Tartu Observatory; EstoniaFil: Cure, M.. Universidad de Valparaíso; ChileFil: Vallverdú, R.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Barba, Rodolfo Hector. Universidad de La Serena; ChileEDP Sciences2016-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37945Kraus, M.; Cidale, Lydia Sonia; Arias, María Laura; Maravelias, G.; Nickeler, D.; et al.; Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73.; EDP Sciences; Astronomy and Astrophysics; 593; 7-2016; 1-130004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201628493info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/09/aa28493-16/aa28493-16.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:01:55Zoai:ri.conicet.gov.ar:11336/37945instacron: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 10:01:55.295CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
title |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
spellingShingle |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. Kraus, M. Circumstellar matter Infrared stars Massive stars LHA 120-S 73 (estrella) Early type stars Supergiant stars |
title_short |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
title_full |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
title_fullStr |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
title_full_unstemmed |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
title_sort |
Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73. |
dc.creator.none.fl_str_mv |
Kraus, M. Cidale, Lydia Sonia Arias, María Laura Maravelias, G. Nickeler, D. Torres, Andrea Fabiana Borges Fernandes, M. Aret, A. Cure, M. Vallverdú, R. Barba, Rodolfo Hector |
author |
Kraus, M. |
author_facet |
Kraus, M. Cidale, Lydia Sonia Arias, María Laura Maravelias, G. Nickeler, D. Torres, Andrea Fabiana Borges Fernandes, M. Aret, A. Cure, M. Vallverdú, R. Barba, Rodolfo Hector |
author_role |
author |
author2 |
Cidale, Lydia Sonia Arias, María Laura Maravelias, G. Nickeler, D. Torres, Andrea Fabiana Borges Fernandes, M. Aret, A. Cure, M. Vallverdú, R. Barba, Rodolfo Hector |
author2_role |
author author author author author author author author author author |
dc.subject.none.fl_str_mv |
Circumstellar matter Infrared stars Massive stars LHA 120-S 73 (estrella) Early type stars Supergiant stars |
topic |
Circumstellar matter Infrared stars Massive stars LHA 120-S 73 (estrella) Early type stars Supergiant stars |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Context. B[e] supergiants are evolved massive stars, enshrouded in a dense wind and surrounded by a molecular and dusty disk. Themechanisms that drive phases of enhanced mass loss and mass ejections, responsible for the shaping of the circumstellar material ofthese objects, are still unclear.Aims. We aim to improve our knowledge on the structure and dynamics of the circumstellar disk of the Large Magellanic Cloud B[e]supergiant LHA 120-S 73.Methods. High-resolution optical and near-infrared spectroscopic data were obtained over a period of 16 and 7 years, respectively.The spectra cover the diagnostic emission lines from [Ca ii] and [O i], as well as the CO bands. These features trace the disk atdifferent distances from the star. We analyzed the kinematics of the individual emission regions by modeling their emission profiles.A low-resolution mid-infrared spectrum was obtained as well, which provides information on the composition of the dusty disk.Results. All diagnostic emission features display double-peaked line profiles, which we interpret as due to Keplerian rotation. We findthat the profile of each forbidden line contains contributions from two spatially clearly distinct rings. In total, we find that LHA 120-S 73 is surrounded by at least four individual rings of material with alternating densities (or by a disk with strongly non-monotonicradial density distribution). Moreover, we find that the molecular ring must have gaps or at least strong density inhomogeneities,or in other words, a clumpy structure. The optical spectra additionally display a broad emission feature at 6160?6180 Å, which weinterpret as molecular emission from TiO. The mid-infrared spectrum displays features of oxygen- and carbon-rich grain species,which indicates a long-lived, stable dusty disk.We cannot confirm the previously reported high value for the stellar rotation velocity. He i λ 5876 is the only clearly detectable pureatmospheric absorption line in our data. Its line profile is strongly variable in both width and shape and resembles of those seen innon-radially pulsating stars. A proper determination of the real underlying stellar rotation velocity is hence not possible.Conclusions. The existence of multiple stable and clumpy rings of alternating density recalls ring structures around planets. Althoughthere is currently insufficient observational evidence, it is tempting to propose a scenario with one (or more) minor bodies or planetsrevolving around LHA 120-S 73 and stabilizing the ring system, in analogy to the shepherd moons in planetary systems. Fil: Kraus, M.. Astronomický ústav; República Checa Fil: Cidale, Lydia Sonia. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Arias, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Maravelias, G.. Astronomický ústav; República Checa Fil: Nickeler, D.. Astronomický ústav; República Checa Fil: Torres, Andrea Fabiana. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Borges Fernandes, M.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil Fil: Aret, A.. Tartu Observatory; Estonia Fil: Cure, M.. Universidad de Valparaíso; Chile Fil: Vallverdú, R.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; Argentina Fil: Barba, Rodolfo Hector. Universidad de La Serena; Chile |
description |
Context. B[e] supergiants are evolved massive stars, enshrouded in a dense wind and surrounded by a molecular and dusty disk. Themechanisms that drive phases of enhanced mass loss and mass ejections, responsible for the shaping of the circumstellar material ofthese objects, are still unclear.Aims. We aim to improve our knowledge on the structure and dynamics of the circumstellar disk of the Large Magellanic Cloud B[e]supergiant LHA 120-S 73.Methods. High-resolution optical and near-infrared spectroscopic data were obtained over a period of 16 and 7 years, respectively.The spectra cover the diagnostic emission lines from [Ca ii] and [O i], as well as the CO bands. These features trace the disk atdifferent distances from the star. We analyzed the kinematics of the individual emission regions by modeling their emission profiles.A low-resolution mid-infrared spectrum was obtained as well, which provides information on the composition of the dusty disk.Results. All diagnostic emission features display double-peaked line profiles, which we interpret as due to Keplerian rotation. We findthat the profile of each forbidden line contains contributions from two spatially clearly distinct rings. In total, we find that LHA 120-S 73 is surrounded by at least four individual rings of material with alternating densities (or by a disk with strongly non-monotonicradial density distribution). Moreover, we find that the molecular ring must have gaps or at least strong density inhomogeneities,or in other words, a clumpy structure. The optical spectra additionally display a broad emission feature at 6160?6180 Å, which weinterpret as molecular emission from TiO. The mid-infrared spectrum displays features of oxygen- and carbon-rich grain species,which indicates a long-lived, stable dusty disk.We cannot confirm the previously reported high value for the stellar rotation velocity. He i λ 5876 is the only clearly detectable pureatmospheric absorption line in our data. Its line profile is strongly variable in both width and shape and resembles of those seen innon-radially pulsating stars. A proper determination of the real underlying stellar rotation velocity is hence not possible.Conclusions. The existence of multiple stable and clumpy rings of alternating density recalls ring structures around planets. Althoughthere is currently insufficient observational evidence, it is tempting to propose a scenario with one (or more) minor bodies or planetsrevolving around LHA 120-S 73 and stabilizing the ring system, in analogy to the shepherd moons in planetary systems. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-07 |
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/11336/37945 Kraus, M.; Cidale, Lydia Sonia; Arias, María Laura; Maravelias, G.; Nickeler, D.; et al.; Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73.; EDP Sciences; Astronomy and Astrophysics; 593; 7-2016; 1-13 0004-6361 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/37945 |
identifier_str_mv |
Kraus, M.; Cidale, Lydia Sonia; Arias, María Laura; Maravelias, G.; Nickeler, D.; et al.; Inhomogeneous molecular ring around the B[e] supergiant LHA 120-S 73.; EDP Sciences; Astronomy and Astrophysics; 593; 7-2016; 1-13 0004-6361 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201628493 info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/09/aa28493-16/aa28493-16.html |
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 |
dc.publisher.none.fl_str_mv |
EDP Sciences |
publisher.none.fl_str_mv |
EDP Sciences |
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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1844613818118832128 |
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13.070432 |