Membership in the Open Cluster M67: Working from Proper Motions via the EM Algorithm

Details Membership in the Open Cluster M67: Working from Proper Motions via the EM Algorithm Membership in the Open Cluster M67: Working from Proper Motions via the EM Algorithm

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..371..403u&link_type=abstract

Statistical Challenges in Modern Astronomy IV ASP Conference Series, Vol. 371, proceedings of the conference held 12-15 June 200

Astronomy and Astrophysics

Astronomy

Scientific paper

A membership study in the region of the open cluster M67 is presented. The employed method comes from a mixture model that overlaps 2 heteroscedastic Gaussian multivariate density functions to model the proper motion data of 1866 stars located in the region of M67.The parameter estimates are obtained via the EM or expectation maximization algorithm applying the McLachlan, Peel, Basford and Adams EMMIX software. The obtained membership probabilities come from Bayes Theorem; three hundred and twenty two most probable members are found, twelve of them of solar type.

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