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Comparing Parametric and Nonparametric Statistical Methods for Studying the Velocity Distributions of Population I Stars

Published online by Cambridge University Press:  07 August 2017

F. Arenou  and
M. L. Bougeard
F. Arenou
Affiliation:
URA D0335 CNRS, Observatoire de Paris-Meudon F-92195 Meudon, France
M. L. Bougeard
Affiliation:
URA 1125 CNRS: I.E.R.S., Observatoire de Paris 61 Av. de l'Observatoire, F-75014 Paris, France

Abstract

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This Paper investigates population I star samples from the viewpoint of the velocity distributions, each being viewed as a mixture. To obtain information on the class centers, clustering techniques are first applied. Secondly, we use a parametric maximum likelihood formulation that we solve by Redner-Walker's E.M. algorithm. The obtained results are compared and discussed from an astrophysical viewpoint.

Keywords

velocity distributionmixturesclustersE.M. algorithm
Type
Impact on Astrophysics
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 265 - 269
Copyright
Copyright © Kluwer 

References

Bougeard, M.L., Arenou, F., 1990: in Errors, Biais, Uncertainties in Astronomy , Cambridge Press, 277–280 Google Scholar
Bougeard, M.L., Arenou, F., Gómez, A.E., 1989, I.S.I. 49th Session Google Scholar
Gómez, A.E., Delhaye, J., Grenier, S., Jaschek, C., Arenou, F., Jaschek, M., 1990, Astron. Astrophys. 236, 95 Google Scholar
Hand, D.J., 1981, Discrimination and classification , N. York, J. Wiley Google Scholar
Redner, Walker, 1984, S.I.A.M. , 26 n°2, 195–239 Google Scholar