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Statistics of stellar populations of star clusters and surrounding fields in the outer disk of the Large Magallanic Cloud

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Statistics of stellar populations of star clusters and surrounding fields in the outer disk of the Large Magallanic Cloud

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Título Statistics of stellar populations of star clusters and surrounding fields in the outer disk of the Large Magallanic Cloud
Autor Santos Junior, Joao Francisco Coelho dos
Piatti, Andres E.
Claria Olmedo, Juan Jose
Bica, Eduardo Luiz Damiani
Geisler, Doug
Dottori, Horacio Alberto
Abstract A comparative analysis of Washington color-magnitude diagrams (CMDs) for 14 star clusters and respective surrounding fields in the Large Magellanic Cloud (LMC) outer disk is presented. Each CCD frame including field and the respective cluster covers an area of 185 arcmin². The stellar population sampled is of intermediate age and metallicity. CMD radial analysis involving star count ratios, morphologies, and integrated light properties are carried out. Luminosity functions (LFs) are also presented. The two main results are, (1) within the range 4 kpc<R<8 kpc, the distance from the LMC center is well correlated with the average age in the sense that inner Ðelds are younger and (2) beyond ≈8 kpc the outer Ðelds do not show evidence of a signiÐcant intermediate-age component in their stellar populations, as inferred from red giant clump star counts.
Contido em The Astronomical journal. Chicago. Vol. 117, no. 6 (June 1999), p. 2841-2855
Assunto Aglomerados estelares
Grande Nuvem de Magalhães
[en] Galaxies : star clusters
[en] Galaxies : stellar content
[en] Magellanic clouds
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108112
Arquivos Descrição Formato
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