On the effectiveness of method of calculating membership probabilities in clustered celestial systems

Details On the effectiveness of method of calculating membership probabilities in clustered celestial systems On the effectiveness of method of calculating membership probabilities in clustered celestial systems

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cha%26a..21..254s&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 21, Issue 2, p. 254-254.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We suggest to use the index E = 1 -N Σ[Pi(1 - Pi)]/(ΣPiΣ(1 -Pi )) as a measure of the effectiveness of a given method of calculating membership probabilities. The various models based on Sander's method were examined this way. Generally speaking, kinematic data (proper motion, radial velocity) are effective observational criteria.

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