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High-Precision Parallaxes and Their Astrophysical Applications

Published online by Cambridge University Press:  07 August 2017

Wan Lai
Wan Lai*
Affiliation:
Shanghai Observatory, Chinese Academy of Sciences 200030 Shanghai, Nandan road 80, China P.R.

Abstract

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As demonstrated by USNO CCD parallax program, a CCD attached to a modest aperature telescope is capable of measuring stellar trigonometric parallax to a precision better than 1.0 mas. consequently, many objects previously regarded as being too distant for ground-based trigonometric distance determinations can now be considered.

In this paper we show the High-precision parallaxes will provide a very good opportunity for the refinement of H-R digrammes and the calibration of luminosity criteria, we also refer to the open cluster and to determination of accurate stellar masses from close binanies.

Type
Impact on Astrophysics
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 213 - 218
Copyright
Copyright © Kluwer 

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