Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...128...69m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 128, no. 1, Nov. 1983, p. 69-73.
Astronomy and Astrophysics
Astronomy
1
Astrometry, Hipparcos Satellite, Spaceborne Astronomy, Variable Stars, Errors, Light Curve, Stellar Motions, Stellar Parallax
Scientific paper
The importance of variable stars in a number of astrophysical domains and the need for accurate parallaxes and proper motions lead the authors to investigate the conditions of their observation by the astrometric satellite. They have developed an analytical method to estimate the accuracy which can be expected at the end of a 2.5 yr mission. The results are presented in the form of a set of curves giving the error on parallax and annual proper motion as a function of the mean magnitude and amplitude of variation. The authors discuss the validity of these calculations in terms of shape, regularity, period, and phase of the light curves for the different types of variables, also taking into account the possible influence of the actual distribution, in space and time, of the instants of observation.
Guibert Jean
Mennessier Marie-Odile
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