Artículo
Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud
Piatti, Andres Eduardo
; Santos Jr., Joao F. C.; Claria Olmedo, Juan Jose
; Bica, Eduardo; Sarajedini, Ata; Geisler, Doug
Fecha de publicación:
08/2001
Editorial:
Oxford University Press
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Colour–magnitude diagrams are presented for the first time for L32, L38, K28 (L43), K44 (L68) and L116, which are clusters projected on to the outer parts of the Small Magellanic Cloud (SMC). The photometry was carried out in the Washington system C and T1 filters, allowing the determination of ages by means of the magnitude difference between the red giant clump and the main-sequence turn-off, and metallicities from the red giant branch locus. The clusters have ages in the range 2–6 Gyr, and metallicities in the range −1.65<[Fe/H]<−1.10, increasing the sample of intermediate-age clusters in the SMC. L116, the outermost cluster projected on to the SMC, is a foreground cluster, and somewhat closer to us than the Large Magellanic Cloud. Our results, combined with those for other clusters in the literature, show epochs of sudden chemical enrichment in the age–metallicity plane, which favour a bursting star formation history as opposed to a continuous one for the SMC.
Palabras clave:
Small Magellanic Cloud
,
Star Cluster
,
Photometry
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Piatti, Andres Eduardo; Santos Jr., Joao F. C.; Claria Olmedo, Juan Jose; Bica, Eduardo; Sarajedini, Ata; et al.; Ages and metallicities of five intermediate-age star clusters projected towards the Small Magellanic Cloud; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 325; 2; 8-2001; 792-802
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