@article{457b5372555f4438af74c07f1be0154a,
title = "Massive open star clusters using the VVV survey: III. A young massive cluster at the far edge of the Galactic bar",
abstract = "Context. Young massive clusters are key to map the Milky Way's structure, and near-infrared large area sky surveys have contributed strongly to the discovery of new obscured massive stellar clusters. Aims. We present the third article in a series of papers focused on young and massive clusters discovered in the VVV survey. This article is dedicated to the physical characterization of VVV{\^a}€‰ CL086, using part of its OB-stellar population. Methods. We physically characterized the cluster using JHKS near-infrared photometry from ESO public survey VVV images, using the VVV-SkZ pipeline, and near-infrared K-band spectroscopy, following the methodology presented in the first article of the series. Results. Individual distances for two observed stars indicate that the cluster is located at the far edge of the Galactic bar. These stars, which are probable cluster members from the statistically field-star decontaminated CMD, have spectral types between O9 and B0{\^a}€‰ V. According to our analysis, this young cluster (1.0 Myr < age < 5.0 Myr) is located at a distance of 11+5 -6 kpc, and we estimate a lower limit for the cluster total mass of (2.8+1.6-1.4) 103 M·. It is likely that the cluster contains even earlier and more massive stars.",
keywords = "Galaxy: disk, Open clusters and associations: individual: VVV CL086, Stars: early-type, Stars: massive, Techniques: photometric, Techniques: spectroscopic",
author = "{Ram{\'i}rez Alegr{\'i}a}, S. and J. Borissova and Chen{\'e}, {A. N.} and E. O'Leary and P. Amigo and D. Minniti and Saito, {R. K.} and D. Geisler and R. Kurtev and M. Hempel and M. Gromadzki and Clarke, {J. R.A.} and I. Negueruela and A. Marco and C. Fierro and C. Bonatto and M. Catelan",
note = "Funding Information: We thank the anonymous referee for useful comments and suggestions, which helped us to improve this Letter. S.R.A. and A.N.C. were supported by the GEMINI-CONICYT project number 32110005. S.R.A. was also supported by the FONDECYT project No. 3140605. The VVV Survey is supported by ESO, by BASAL Center for Astrophysics and Associated Technologies PFB-06, by FONDAP Center for Astrophysics 15010003, and by the Ministry for the Economy, Development, and Tourism{\textquoteright}s Programa Inicativa Cient{\'i}fica Milenio through grant IC 12009, awarded to The Millennium Institute of Astrophysics (MAS). Support for J.B. is provided by FONDECYT Regular No. 1120601, P.A. acknowledges support from ALMA-CONICYT project number 31110002 and D.M., from FONDECYT No. 1130196. M.G. is financed by the GEMINI-CONICYT Fund, allocated to Project 32110014. D.G. gratefully acknowledges support from the Chilean BASAL Centro de Excelencia en Astrof{\'i}sica y Tecnolog{\'i}as Afines (CATA) grant PFB-06/2007. R.K.S. acknowledges partial support from FONDECYT through grant 1130140, and CNPq/Brazil through projects 310636/2013-2 and 481468/2013-7. M.C. acknowledges additional support from FONDECYT through grants #1110326 and 1141141. The work of I.N. and A.M. is partially supported by the Spanish Ministerio de Econom{\'i}a y Competitividad (Mineco) under grant AYA2012-39364-C02-02. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.",
year = "2014",
month = apr,
doi = "10.1051/0004-6361/201322619",
language = "English",
volume = "564",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",
}