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| DOI | 10.1017/PASA.2018.24 | ||||
| Año | 2018 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
We communicate the discovery of a new globular cluster in the Galaxy that was first detected on WISE/2MASS images and is now confirmed with VVVX photometry. It is a Palomar-like cluster projected at = 359.15 degrees, b = 5.73 degrees , and may be related to the bulge. We derive an absolute magnitude of M-v approximate to -3.3, thus being an underluminous globular cluster. Our analyses provide a reddening of E(B - V) = 1.08 +/- 0.18 and a distance to the Sun d(circle dot) = 6.3 +/- 1 kpc, which implies a current position in the bulge volume. The estimated metallicity is [Fe/H] = -1.5 +/- 0.25. It adds to the recently discovered faint globular cluster (Minniti 22) and candidates found with VVV. building up expectations of approximate to 50 globular clusters yet to be discovered in the bulge. We also communicate the discovery of an old open cluster in the same VVVX tile as the globular cluster. The VVVX photometry provided E(B - V) = 0.62 +/- 0.1, d(circle dot) = 7.6 +/- 1 kpc, and an age of 1.5 +/- 0.3 Gyr. With a height from the plane of approximate to 0.8 kpc, it adds to nine Gyr-class clusters recently discovered within 0.8 <= Z <= 2.2 kpc, as recently probed in the single VVV tile b201. We suggest that these findings may be disclosing the thick disk at the bulge. which so far has no open cluster counterpart. and hardly any individual star. Thus, the VVV and VVVX surveys are opening new windows for follow-up studies, to employ present and future generations of large aperture telescopes.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Bica, E. | - |
Universidade Federal do Rio Grande do Sul - Brasil
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| 2 | MINNITI-DEL BARCO, DANTE | Hombre |
Instituto Milenio de Astrofísica - Chile
Vatican Observ - Vaticano Universidad Nacional Andrés Bello - Chile Vatican Observatory - Italia |
| 3 | Bonatto, C. J. | Hombre |
Univ Fed Rio Grande do Sul - Brasil
Universidade Federal do Rio Grande do Sul - Brasil |
| 4 | Hempel, Maren | Mujer |
Pontificia Universidad Católica de Chile - Chile
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| Fuente |
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| Fondo Nacional de Desarrollo Científico y Tecnológico |
| Ministerio de Economía, Fomento y Turismo, Chile |
| CNPq/Brazil |
| Fondecyt regular grant |
| ESO Public Survey program |
| BASAL Center for Astrophysics and Associated Technologies (CATA) |
| BASAL CATA |
| Ministry for the Economy, Development and Tourism, Programa Iniciativa Cientifica Milenio grant |
| Cambridge Astronomical Survey Unit |
| Astronomical Research in the Southern Hemisphere |
| Agradecimiento |
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| We thank an anonymous referee for important comments and suggestions. We thank Dr D. Camargo for communicating us the coordinates of the GC candidate. We acknowledge data from the ESO Public Survey program ID 179.B-2002 taken with the VISTA telescope, and products from the Cambridge Astronomical Survey Unit (CASU). Support for this work was provided by the BASAL Center for Astrophysics and Associated Technologies (CATA) through grant PFB-06, and by the Ministry for the Economy, Development and Tourism, Programa Iniciativa Cientifica Milenio grant IC120009, awarded to the Millennium Institute of Astrophysics (MAS). D. M. acknowledges support from FONDECYT Regular grant No. 1170121. M. H. also acknowledges support from BASAL CATA through grant PFB-06. C.B. and E.B. also acknowledge support from CNPq/Brazil. This research is based on observations collected at the European Organisation from Astronomical Research in the Southern Hemisphere under ESO programs. |
| We thank an anonymous referee for important comments and suggestions. We thank Dr D. Camargo for communicating us the coordinates of the GC candidate. We acknowledge data from the ESO Public Survey program ID 179.B-2002 taken with the VISTA telescope, and products from the Cambridge Astronomical Survey Unit (CASU). Support for this work was provided by the BASAL Center for Astrophysics and Associated Technologies (CATA) through grant PFB-06, and by the Ministry for the Economy, Development and Tourism, Programa Iniciativa Cientifica Milenio grant IC120009, awarded to the Millennium Institute of Astrophysics (MAS). D. M. acknowledges support from FONDECYT Regular grant No. 1170121. M. H. also acknowledges support from BASAL CATA through grant PFB-06. C.B. and E.B. also acknowledge support from CNPq/Brazil. This research is based on observations collected at the European Organisation from Astronomical Research in the Southern Hemisphere under ESO programs. |