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dc.date.accessioned 2019-11-08T16:41:37Z
dc.date.available 2019-11-08T16:41:37Z
dc.date.issued 2013
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/85245
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. en
dc.language en es
dc.subject Infrared: stars es
dc.subject Open clusters and associations: general es
dc.subject Stars: massive es
dc.subject Stars: Wolf-Rayet es
dc.subject Surveys es
dc.title Massive open star clusters using the VVV survey en
dc.type Articulo es
sedici.identifier.other doi:10.1051/0004-6361/201220107 es
sedici.identifier.other eid:2-s2.0-84872084924 es
sedici.identifier.issn 0004-6361 es
sedici.title.subtitle II. Discovery of six clusters with Wolf-Rayet stars en
sedici.creator.person Baume, Gustavo Luis es
sedici.creator.person Feinstein Baigorri, Carlos es
sedici.description.note La lista completa de autores que integran el documento puede consultarse en el archivo. es
sedici.subject.materias Ciencias Astronómicas es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Astronómicas y Geofísicas es
mods.originInfo.place Instituto de Astrofísica de La Plata es
sedici.subtype Revision es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Astronomy and Astrophysics es
sedici.relation.journalVolumeAndIssue vol. 549 es
sedici.rights.sherpa * Color: green * Pre-print del autor: si * Post-print del autor: si * Versión de editor/PDF:si * Condiciones: >>On author's personal website or institutional website or OAI compliant website >>Some journals require an embargo for deposit in funder's designated repositories (see journal) >>Publisher's version/PDF may be used (see journal) >>Must link to publisher version >>Publisher copyright and source must be acknowledged >>Non-commercial * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/0004-6361/es/


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Excepto donde se diga explícitamente, este item se publica bajo la siguiente licencia Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)