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New Galactic star clusters discovered in the VVV survey

Borissova, J., Bonatto, C., Kurtev, R., Clarke, J.R.A., Penaloza, F., Sale, S.E., Minniti, D., Alonso-Garcia, J., Artigau, E., Barbá, R., and others. (2011) New Galactic star clusters discovered in the VVV survey. Astronomy and Astrophysics, 532 . ISSN 0004-6361. (doi:10.1051/0004-6361/201116662)

Abstract

Context. VISTA Variables in the Vía Láctea (VVV) is one of the six ESO Public Surveys operating on the new 4-m Visible and Infrared Survey Telescope for Astronomy (VISTA). VVV is scanning the Milky Way bulge and an adjacent section of the disk, where star formation activity is high. One of the principal goals of the VVV Survey is to find new star clusters of differentages. Aims. In order to trace the early epochs of star cluster formation we concentrated our search in the directions to those of known star formation regions, masers, radio, and infrared sources. Methods. The disk area covered by VVV was visually inspected using the pipeline processed and calibrated K S-band tile images for stellar overdensities. Subsequently, we examined the composite JHKS and ZJKS color images of each candidate. PSF photometry of 15 � 15 arcmin fields centered on the candidates was then performed on the Cambridge Astronomy Survey Unit reduced images. After statistical field-star decontamination, color-magnitude and color-color diagrams were constructed and analyzed. Results. We report the discovery of 96 new infrared open clusters and stellar groups. Most of the new cluster candidates are faint and compact (with small angular sizes), highly reddened, and younger than 5 Myr. For relatively well populated cluster candidates we derived their fundamental parameters such as reddening, distance, and age by fitting the solar-metallicity Padova isochrones to the color-magnitude diagrams. © 2011 ESO.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201116662
Additional information: Unmapped bibliographic data: C7 - A131 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Astron. Astrophys. [Field not mapped to EPrints] AD - Departamento de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Casilla 5030, Valparaíso, Chile [Field not mapped to EPrints] AD - Universidade Federal Do Rio Grande Do sul, Departamento de Astronomia, CP 15051, RS, Porto Alegre 91501-970, Brazil [Field not mapped to EPrints] AD - Département de Physique and Observatoire du Mont Mégantic, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, QC H3C 3J7, Canada [Field not mapped to EPrints] AD - Facultad de Ciencias Astronómicas y Geofísicas, Instituto de Astrofísica de la Plata, Paseo del Bosque s/n, La Plata, Argentina [Field not mapped to EPrints] AD - Departamento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Casilla 306, Santiago 22, Chile [Field not mapped to EPrints] AD - Departamento de Astronomía, Universidad de Concepción, Casilla 160, Chile [Field not mapped to EPrints] AD - Departamento de Astronomia, Universidade de Sao Paulo, Rua Do Matao, Cidade Universitaria, 05508-900-Sao Paulo/SP, Brazil [Field not mapped to EPrints] AD - Centre for Astrophysics and Planetary Science, University of Kent, Canterbury, Kent, CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, China [Field not mapped to EPrints] AD - Department of Astronomy and Space Science, Kyung Hee University, Yongin-shi, Kyungki-do 449-701, South Korea [Field not mapped to EPrints] AD - European Southern Observatory, Ave. Alonso de Cordova 3107, Casilla 19, Santiago 19001, China [Field not mapped to EPrints] AD - Centro de Astrofísica da Universidade Do Porto, Rua das Estrelas, 4150-762 Porto, Portugal [Field not mapped to EPrints] AD - Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, United Kingdom [Field not mapped to EPrints] AD - National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan [Field not mapped to EPrints] AD - European Southern Observatory, Karl-Schawarzschild-Strasse 2, 85748 Garching bei Munchen, Germany [Field not mapped to EPrints] AD - Departamento de Física, Universidad de la Serena, Cisternas 1200 Norte, La Serena, Chile [Field not mapped to EPrints] AD - Instituto de Ciencias Astronómicas de la Tierra y Del Espacio (ICATE-CONICET), Av. España Sur 1512, J5402DSP, San Juan, Argentina [Field not mapped to EPrints] AD - Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, United States [Field not mapped to EPrints] AD - Vatican Observatory, V00120 Vatican City State, Italy [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Infrared: general, Open clusters and associations: general, Stars: early-type, Angular sizes, Cambridge, Color images, Color magnitude diagrams, Color-color diagrams, Fundamental parameters, Galactic stars, Infrared source, Infrared: general, Isochrones, Milky ways, Open clusters, Open clusters and associations: general, Star clusters, Star formation regions, Star formations, Stars: early-type, Visible and infra-red survey telescope for astronomies, Color, Light sources, Surveys, Stars
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 21 Jul 2015 10:05 UTC
Last Modified: 29 May 2019 14:51 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/49564 (The current URI for this page, for reference purposes)
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