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Title:
Deep infrared view of the Galactic stellar cluster [DBSB2003] 179.
Authors:
Borissova, J.; Ivanov, V. D.; Hanson, M.; Georgiev, L.; Minniti, D.; Kurtev, R.; Geisler, D.
Affiliation:
AA(Departamento de Fisica y Astronomia, Universidad de Valparaiso, Valparaiso, Chile; ), AB(European Southern Observatory, Santiago 19001, Chile), AC(University of Cincinnati, Cincinnati, USA), AD(Instituto de Astronomia, UNAM, Apartado Postal 70-254, CP 04510 Mexico DF, Mexico), AE(Departmento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Santiago, Chile), AF(Departamento de Fisica y Astronomia, Universidad de Valparaiso, Valparaiso, Chile), AG(Universidad de Concepcion, Concepcion, Chile)
Publication:
VI Reunion Anual Sociedad Chilena de Astronomia (SOCHIAS), held in Valparaiso, Chile, 7 - 9 November 2007, p. 10.
Publication Date:
00/2007
Origin:
AUTHOR
Keywords:
Galaxy: open clusters and associations: general, Infrared: Infrared: stars, Stars: formation, early-type, Individual [DBSB2003] 179
Bibliographic Code:
2007soch.conf...10B

Abstract

We present a deep, near-infrared photometric and spectroscopic study of the young massive star cluster [DBSB2003] 179. Photometry was obtained first on 180 cluster members to determine preliminary cluster parameters and to isolate stars of interest for follow up spectroscopy. On May 2007, under ESO program 79.D-0149 we obtained medium-resolution (R = 9 000) K-band spectra of several candidate cluster stars. We selected four stars in the cluster to observe, but due to the high density of the cluster we have spectra on an additional six stars which fell into the slit serendipitously. The preliminary analysis shows that seven of them are bright emission line stars, most probably early O4-O6 supergiants. Also, one late-O dwarf and one massive YSO were identified. The stellar population of [DBSB2003] 179 is consistent with an age of 3-5 Myr and the total mass of 8000-9000 solar masses. This puts the cluster among the moderately massive young clusters in the Galaxy.
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