[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/PKAS.2015.30.2.271

A NEW NON-PARAMETRIC APPROACH TO DETERMINE PROPER MOTIONS OF STAR CLUSTERS

PRIYATIKANTO, RHOROM (Astronomy Program, Institut Teknologi Bandung)
ARIFYANTO, MOCHAMAD IKBAL (Astronomy Program, Institut Teknologi Bandung)

Publication Information

Publications of The Korean Astronomical Society / v.30, no.2, 2015 , pp. 271-273 More about this Journal

Abstract

The bulk motion of star clusters can be determined after careful membership analysis using parametric or non-parametric approaches. This study aims to implement non-parametric membership analysis based on Binned Kernel Density Estimators which takes into account measurements errors (simply called BKDE-e) to determine the average proper motion of each cluster. This method is applied to 178 selected star clusters with angular diameters less than 20 arcminutes. Proper motion data from UCAC4 are used for membership determination. Non-parametric analysis using BKDE-e successfully determined the average proper motion of 129 clusters, with good accuracy. Compared to COCD and NCOVOCC, there are 79 clusters with less than $3{\sigma}$ difference. Moreover, we are able to analyse the distribution of the member stars in vector point diagrams which is not always a normal distribution.

Keywords

proper motion; open clusters and associations;

Citations & Related Records

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