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dc.contributor.author
Chené, A. N.
dc.contributor.author
Borissova, J.
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Bonatto, C.
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Majaess, D. J.
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Baume, Gustavo Luis
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Clarke, J. R. A.
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Kurtev, R.
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Schnurr, O.
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Bouret, J. C.
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Catelan, M.
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Emerson, J. P.
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Feinstein Baigorri, Carlos
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Geisler, D.
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de Grijs, R.
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Hervé, A.
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Ivanov, V. D.
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Kumar, M. S. N.
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Lucas, P.
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Mahy, L.
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Martins, F.
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Mauro, F.
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Minniti, Dante
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Moni Bidin, C.
dc.date.available
2017-06-21T18:40:41Z
dc.date.issued
2013-03
dc.identifier.citation
Chené, A. N.; Borissova, J.; Bonatto, C.; Majaess, D. J.; Baume, Gustavo Luis; et al.; Massive open star clusters using the VVV survey: II discovery of six clusters with Wolf-Rayet stars; Edp Sciences S A; Astronomy And Astrophysics; 549; 98; 3-2013; 1-17
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/18554
dc.description.abstract
Context. The ESO Public Survey “VISTA Variables in the Vía Láctea” (VVV) provides deep multi-epoch infrared observations for an unprecedented 562 sq. degrees of the Galactic bulge, and adjacent regions of the disk. Nearly 150 new open clusters and cluster candidates have been discovered in this survey. Aims. This is the second in a series of papers about young, massive open clusters observed using the VVV survey. We present the first study of six recently discovered clusters. These clusters contain at least one newly discovered Wolf-Rayet (WR) star. Methods. Following the methodology presented in the first paper of the series, wide-field, deep JHKs VVV observations, combined with new infrared spectroscopy, are employed to constrain fundamental parameters for a subset of clusters. Results. We find that the six studied stellar groups are real young (2–7 Myr) and massive (between 0.8 and 2.2 × 103 M) clusters. They are highly obscured (AV ∼ 5−24 mag) and compact (1–2 pc). In addition to WR stars, two of the six clusters also contain at least one red supergiant star, and one of these two clusters also contains a blue supergiant. We claim the discovery of 8 new WR stars, and 3 stars showing WR-like emission lines which could be classified WR or OIf. Preliminary analysis provides initial masses of ∼30–50 M for the WR stars. Finally, we discuss the spiral structure of the Galaxy using the six new clusters as tracers, together with the previously studied VVV clusters.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Edp Sciences S A
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Open Clusters
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Infrared Stars
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Asscociations
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Wolf Rayet Stars
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Massive open star clusters using the VVV survey: II discovery of six clusters with Wolf-Rayet stars
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2015-05-29T16:32:30Z
dc.journal.volume
549
dc.journal.number
98
dc.journal.pagination
1-17
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Chené, A. N.. Universidad de Valparaíso; Chile
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Fil: Borissova, J.. Universidad de Valparaíso; Chile
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Fil: Bonatto, C.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Majaess, D. J.. Saint Mary’s University; Canadá
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Fil: Baume, Gustavo Luis. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
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Fil: Clarke, J. R. A.. Universidad de Valparaíso; Chile
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Fil: Kurtev, R.. Universidad de Valparaíso; Chile
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Fil: Schnurr, O.. Leibniz Institut für Astrophysik Potsdam; Alemania
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Fil: Bouret, J. C.. Laboratoire d’Astrophysique de Marseille; Francia
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Fil: Catelan, M.. The Milky Way Millennium Nucleus; Chile
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Fil: Emerson, J. P.. Queen Mary University of London; Reino Unido
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Fil: Feinstein Baigorri, Carlos. 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
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Fil: Geisler, D.. Universidad de Concepción; Chile
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Fil: de Grijs, R.. Peking University; China
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Fil: Hervé, A.. Universite de Liege; Bélgica
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Fil: Ivanov, V. D.. European Southern Observatory; Chile
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Fil: Kumar, M. S. N.. Centro de Astrofisica da Universidade do Porto; Portugal
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Fil: Lucas, P.. University Of Hertfordshire; Reino Unido
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Fil: Mahy, L.. Peking University; China
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Fil: Martins, F.. Universite Montpellier II; Francia
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Fil: Mauro, F.. Universidad de Concepción; Chile
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Fil: Minniti, Dante. The Milky Way Millennium Nucleus; Chile
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Fil: Moni Bidin, C.. Universidad de Concepción; Chile
dc.journal.title
Astronomy And Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201220107
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2013/01/aa20107-12/aa20107-12.html


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