Intriguing detection of 12CO molecular emission in a classical Be star

Autores
Cochetti, Yanina Roxana; Arias, María Laura; Krause, M.; Cidale, Lydia Sonia; Torres Ramos, Arianna Grisel; Granada, Anahi; Maryeva, O.V.
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars present in their spectra heterogeneous features that reveal the presence of regions with very different properties in a gaseous and dusty envelope. Aims. Our goal is to study the evolution of the disks around peculiar B stars through the variability of their physical properties and dynamical structure, as well as to set constraints on different models and disk forming mechanisms. Methods. Throughout the last decade, we have carried out temporal monitoring of a sample of objects in the near infrared using spectroscopic facilities at the Gemini and Las Campanas Observatories. In the present work, we focus on the classical Be star 12 Vul, for which also optical spectra have been collected quasi-simultaneously. Results. We observed variability in the hydrogen line profiles of 12 Vul, attributed to dissipating and building-up processes of the circumstellar envelope. Also, we found that this Be star presented the 12CO band heads in emission in one observation. The emission of this molecule has not been previously reported in a Be star, while it is a common feature among B[e] stars. We obtained parameters to describe the 12CO emitting region and propose different scenarios to explain this intriguing emission.
Fil: Cochetti, Yanina Roxana. 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
Fil: Krause, M.. Czech Academy of Sciences; República Checa
Fil: Cidale, Lydia Sonia. 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: Torres Ramos, Arianna Grisel. 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: Granada, Anahi. Universidad Nacional de Río Negro. Sede Andina. Laboratorio de Procesamiento de Señales Aplicadas y Computación de Alto Rendimiento; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Maryeva, O.V.. Czech Academy of Sciences; República Checa. Lomonosov Moscow State University. Sternberg Astronomical Institute; Rusia
Materia
CIRCUMSTELLAR MATTER
STARS: EMISSION-LINE, BE
TECHNIQUES: SPECTROSCOPIC
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:11336/145320
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Intriguing detection of 12CO molecular emission in a classical Be starCochetti, Yanina RoxanaArias, María LauraKrause, M.Cidale, Lydia SoniaTorres Ramos, Arianna GriselGranada, AnahiMaryeva, O.V.CIRCUMSTELLAR MATTERSTARS: EMISSION-LINE, BETECHNIQUES: SPECTROSCOPIChttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars present in their spectra heterogeneous features that reveal the presence of regions with very different properties in a gaseous and dusty envelope. Aims. Our goal is to study the evolution of the disks around peculiar B stars through the variability of their physical properties and dynamical structure, as well as to set constraints on different models and disk forming mechanisms. Methods. Throughout the last decade, we have carried out temporal monitoring of a sample of objects in the near infrared using spectroscopic facilities at the Gemini and Las Campanas Observatories. In the present work, we focus on the classical Be star 12 Vul, for which also optical spectra have been collected quasi-simultaneously. Results. We observed variability in the hydrogen line profiles of 12 Vul, attributed to dissipating and building-up processes of the circumstellar envelope. Also, we found that this Be star presented the 12CO band heads in emission in one observation. The emission of this molecule has not been previously reported in a Be star, while it is a common feature among B[e] stars. We obtained parameters to describe the 12CO emitting region and propose different scenarios to explain this intriguing emission.Fil: Cochetti, Yanina Roxana. 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; ArgentinaFil: Krause, M.. Czech Academy of Sciences; República ChecaFil: Cidale, Lydia Sonia. 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: Torres Ramos, Arianna Grisel. 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: Granada, Anahi. Universidad Nacional de Río Negro. Sede Andina. Laboratorio de Procesamiento de Señales Aplicadas y Computación de Alto Rendimiento; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Maryeva, O.V.. Czech Academy of Sciences; República Checa. Lomonosov Moscow State University. Sternberg Astronomical Institute; RusiaEDP Sciences2021-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/145320Cochetti, Yanina Roxana; Arias, María Laura; Krause, M.; Cidale, Lydia Sonia; Torres Ramos, Arianna Grisel; et al.; Intriguing detection of 12CO molecular emission in a classical Be star; EDP Sciences; Astronomy and Astrophysics; 647; 3-2021; 1-60004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202040143info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2021/03/aa40143-20/aa40143-20.htmlinfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2103.01699info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:18:11Zoai:ri.conicet.gov.ar:11336/145320instacron: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:34982025-10-22 12:18:12.291CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Intriguing detection of 12CO molecular emission in a classical Be star
title Intriguing detection of 12CO molecular emission in a classical Be star
spellingShingle Intriguing detection of 12CO molecular emission in a classical Be star
Cochetti, Yanina Roxana
CIRCUMSTELLAR MATTER
STARS: EMISSION-LINE, BE
TECHNIQUES: SPECTROSCOPIC
title_short Intriguing detection of 12CO molecular emission in a classical Be star
title_full Intriguing detection of 12CO molecular emission in a classical Be star
title_fullStr Intriguing detection of 12CO molecular emission in a classical Be star
title_full_unstemmed Intriguing detection of 12CO molecular emission in a classical Be star
title_sort Intriguing detection of 12CO molecular emission in a classical Be star
dc.creator.none.fl_str_mv Cochetti, Yanina Roxana
Arias, María Laura
Krause, M.
Cidale, Lydia Sonia
Torres Ramos, Arianna Grisel
Granada, Anahi
Maryeva, O.V.
author Cochetti, Yanina Roxana
author_facet Cochetti, Yanina Roxana
Arias, María Laura
Krause, M.
Cidale, Lydia Sonia
Torres Ramos, Arianna Grisel
Granada, Anahi
Maryeva, O.V.
author_role author
author2 Arias, María Laura
Krause, M.
Cidale, Lydia Sonia
Torres Ramos, Arianna Grisel
Granada, Anahi
Maryeva, O.V.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv CIRCUMSTELLAR MATTER
STARS: EMISSION-LINE, BE
TECHNIQUES: SPECTROSCOPIC
topic CIRCUMSTELLAR MATTER
STARS: EMISSION-LINE, BE
TECHNIQUES: SPECTROSCOPIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars present in their spectra heterogeneous features that reveal the presence of regions with very different properties in a gaseous and dusty envelope. Aims. Our goal is to study the evolution of the disks around peculiar B stars through the variability of their physical properties and dynamical structure, as well as to set constraints on different models and disk forming mechanisms. Methods. Throughout the last decade, we have carried out temporal monitoring of a sample of objects in the near infrared using spectroscopic facilities at the Gemini and Las Campanas Observatories. In the present work, we focus on the classical Be star 12 Vul, for which also optical spectra have been collected quasi-simultaneously. Results. We observed variability in the hydrogen line profiles of 12 Vul, attributed to dissipating and building-up processes of the circumstellar envelope. Also, we found that this Be star presented the 12CO band heads in emission in one observation. The emission of this molecule has not been previously reported in a Be star, while it is a common feature among B[e] stars. We obtained parameters to describe the 12CO emitting region and propose different scenarios to explain this intriguing emission.
Fil: Cochetti, Yanina Roxana. 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
Fil: Krause, M.. Czech Academy of Sciences; República Checa
Fil: Cidale, Lydia Sonia. 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: Torres Ramos, Arianna Grisel. 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: Granada, Anahi. Universidad Nacional de Río Negro. Sede Andina. Laboratorio de Procesamiento de Señales Aplicadas y Computación de Alto Rendimiento; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Maryeva, O.V.. Czech Academy of Sciences; República Checa. Lomonosov Moscow State University. Sternberg Astronomical Institute; Rusia
description Context. In the group of B stars with spectroscopic peculiarities, we can find the Be and the B[e] stars. The Be stars are early-type rapid rotators that present, as their principal characteristic, emission lines of hydrogen and singly ionized metals due to the presence of a gaseous envelope. The B[e] stars present in their spectra heterogeneous features that reveal the presence of regions with very different properties in a gaseous and dusty envelope. Aims. Our goal is to study the evolution of the disks around peculiar B stars through the variability of their physical properties and dynamical structure, as well as to set constraints on different models and disk forming mechanisms. Methods. Throughout the last decade, we have carried out temporal monitoring of a sample of objects in the near infrared using spectroscopic facilities at the Gemini and Las Campanas Observatories. In the present work, we focus on the classical Be star 12 Vul, for which also optical spectra have been collected quasi-simultaneously. Results. We observed variability in the hydrogen line profiles of 12 Vul, attributed to dissipating and building-up processes of the circumstellar envelope. Also, we found that this Be star presented the 12CO band heads in emission in one observation. The emission of this molecule has not been previously reported in a Be star, while it is a common feature among B[e] stars. We obtained parameters to describe the 12CO emitting region and propose different scenarios to explain this intriguing emission.
publishDate 2021
dc.date.none.fl_str_mv 2021-03
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/11336/145320
Cochetti, Yanina Roxana; Arias, María Laura; Krause, M.; Cidale, Lydia Sonia; Torres Ramos, Arianna Grisel; et al.; Intriguing detection of 12CO molecular emission in a classical Be star; EDP Sciences; Astronomy and Astrophysics; 647; 3-2021; 1-6
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/145320
identifier_str_mv Cochetti, Yanina Roxana; Arias, María Laura; Krause, M.; Cidale, Lydia Sonia; Torres Ramos, Arianna Grisel; et al.; Intriguing detection of 12CO molecular emission in a classical Be star; EDP Sciences; Astronomy and Astrophysics; 647; 3-2021; 1-6
0004-6361
1432-0746
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202040143
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2021/03/aa40143-20/aa40143-20.html
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2103.01699
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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score 12.982451

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