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Statistical Effects from Hipparcos Astrometry

Published online by Cambridge University Press:  30 March 2016

Frédéric Arenou  and
Xavier Luri
Frédéric Arenou
Affiliation:
DASGAL/URA 335 du C.N.R.S. – Observatoire de Paris-Meudon, F-92195 Meudon Cedex, France - Frederic.Arenou@obspm.fr
Xavier Luri
Affiliation:
Departament d’Astronomia i Meteorologia, Universitat de Barcelona, Avda. Diagonal 647, E-08028, Barcelona, Spain – xluri@am.ub.es

Abstract

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The Hipparcos astrometry is used mainly for the derivation of stellar physical quantities such as luminosity, masses and velocity. However, sample selections on data with observational errors or an intrinsic dispersion may lead to biased estimates, especially when the error distributions are non-Gaussian. We review the classical biases and the ways to avoid them through the use of statistical methods.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 661 - 664
Copyright
Copyright © Astronomical Society of Pacific 2002

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