Discussion on ``Nonparametric Estimation of Dark Matter Distributions'' by Wang et al.

Details Discussion on ``Nonparametric Estimation of Dark Matter Distributions'' by Wang et al. Discussion on ``Nonparametric Estimation of Dark Matter Distributions'' by Wang et al.

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..371..280f&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

We consider the question: When should data modeling in astronomy be based on nonparametric vs. parametric modeling techniques? Two historical cases are considered. For understanding binary star and extrasolar planet systems, parametric modeling using well-established theory based on Newtonian gravity is successful and appropriate. For understanding the structure of elliptical galaxies, confusion has persisted for several decades regarding which parametric model is best. Here, where the astrophysical situation is complex and inadequately understood, nonparametric approaches such as those described by Professor Wang are preferred.

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