Aglomerados abertos: determinação de parâmetros cinemáticos e fundamentais / Open clusters: fundamental and kinematic parameters determination.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Our group has dedicate a special attention to maintain the New Catalogue of Optically Visible Open Clusters and Candidates (Dias et al.[1] hereinafter DAML02) that is being continuously updated with new results from the literature. Besides maintaining the catalogue, our group is actively producing new results such as the mean absolute proper motion and membership determination (Dias et. al. [2] [3] [4]) and discovering new open clusters (Alessi et al.[5]) contributing to complete the knowledge of the hole sample of open clusters in the Galaxy. In this work we present the first results of the kinematic and photometric study of the open clusters with unknown distance and age in DAML02. The membership probabilities of the stars in the region of each cluster were determined applying the statistical method of Zhao e He [8] using the individual stellar UCAC2 (Zacharias et.al.[9]) proper motions. Consequently, the mean absolute proper motion of the clusters were also estimated. Using the investigated stars we were able to construct the colourmagnitude diagrams that allowed us to derive preliminary estimates of the fundamental parameters of the clusters such as reddening, distance and ages where the 2MASS (Strutskie et.al.[10]) photometric data were considered.

ASSUNTO(S)

proper motions and membership aglomerados abertos fundamental parameters movimentos próprios e probabilidades de pertinência open clusters parâmetros fundamentais

ACESSO AO ARTIGO

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