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An application of the k-th nearest neighbor method to open cluster membership determination TEXT SIZE: A A A

Open clusters are collections of stars that form and evolve together as a group. As open clusters age, their motions through a galaxy can make them difficult to identify compared with background stars. This article introduces a new method which can better differentiate stars that are members of an open cluster compared to background stars, leading to improvements in this field.

http://www.raa-journal.org/raa/index.php/raa/article/view/3073

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