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dc.contributor.author
Cochetti, Yanina Roxana
dc.contributor.author
Arias, María Laura
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Krause, M.
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Cidale, Lydia Sonia
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Torres Ramos, Arianna Grisel
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Granada, Anahi
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Maryeva, O.V.
dc.date.available
2021-10-28T14:13:25Z
dc.date.issued
2021-03
dc.identifier.citation
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
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/145320
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CIRCUMSTELLAR MATTER
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STARS: EMISSION-LINE, BE
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TECHNIQUES: SPECTROSCOPIC
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Intriguing detection of 12CO molecular emission in a classical Be star
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-07-01T14:46:29Z
dc.identifier.eissn
1432-0746
dc.journal.volume
647
dc.journal.pagination
1-6
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
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
dc.description.fil
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
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Fil: Krause, M.. Czech Academy of Sciences; República Checa
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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
dc.description.fil
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
dc.description.fil
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
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Fil: Maryeva, O.V.. Czech Academy of Sciences; República Checa. Lomonosov Moscow State University. Sternberg Astronomical Institute; Rusia
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/202040143
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2021/03/aa40143-20/aa40143-20.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2103.01699
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