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- Antonio Uribe, Mario A. Higuera, Eduardo Brieva, STELLAR MEMBERSHIP IN THE REGION OF THE DOUBLE CLUSTER h AND x PERSEI FROM PROPER MOTIONS AND POSITIONS USING A MULTIVARIATE PARAMETRIC MODEL. A FIRST APPROACH. , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 22 No. 85 (1998)
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Abstract
The incidence of accidental errors of proper motion data in the solution of the stellar membership to open clusters is analysed. A mixed bivatiate normal model with correlation coefficient is used. The parameters of this mixture are determined by the maximum likelihood method solving a fourteen non linear equation system with constraints on the correlation, the percentage o field stars and the standard deviations. The method is applied to sol ve the membership problem in the open cluster NGC2287 and a comparison with those membership results from proper motions without' the consideration of accidental errors is made.
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