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High-Precision Astrometry and the Modelling of Stellar Spectra

Published online by Cambridge University Press:  07 August 2017

Bengt Gustafsson
Bengt Gustafsson*
Affiliation:
Uppsala Astronomical Observatory Box 515 S-751 20 Uppsala Sweden

Abstract

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The impact of high-precision astrometry on modelling of stellar spectra and determination of fundamental stellar parameters for single stars is discussed. It is found to be considerable, but improvements in the understanding of stellar atmospheres, and in particular of the physical background of luminosity (i.e., surface-gravity) criteria will be needed in order to match the possibilities of stellar parallaxes with accuracies on the order of a few percents or better.

Type
2. Current and Future Needs for Very Accurate Astrometry
Information
Symposium - International Astronomical Union , Volume 166: Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry , 1995 , pp. 143 - 148
Copyright
Copyright © Kluwer 1995 

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