NGC 6522 : an intermediate metallicity globular cluster projected on the baade window
We studied NGC 6522 colour magnitude diagrams using CCD photometry with BV filters. We have carefully estimated the reddening, which is criticai for Baade Window studies, obtaining E(B-V) = 0.55. We derive for this intermediate metallicity cluster, a distance of 6.2 kpc, slightly foreground to the b...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1994 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/98062 |
| Acceso en línea: | http://hdl.handle.net/10183/98062 |
| Access Level: | acceso abierto |
| Palabra clave: | Astrofisica extragalatica Metalicidade Abundancia Aglomerados globulares Nucleo galatico Aglomerado globular NGC 6522 Evolucao estelar Globular clusters: NGC 6522 Galaxy: center Galaxy: abundances HR diagram |
| Sumario: | We studied NGC 6522 colour magnitude diagrams using CCD photometry with BV filters. We have carefully estimated the reddening, which is criticai for Baade Window studies, obtaining E(B-V) = 0.55. We derive for this intermediate metallicity cluster, a distance of 6.2 kpc, slightly foreground to the bulk of the metal-rich bulge population. The CMD properties of the cluster core show an enhanced and extended blue horizontal branch, a characteristic in common with many other core collapsed globular clusters. |
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