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Results of VLBI Observations of Radio Stars and Their Potential for Linking the HIPPARCOS and Extragalactic Reference Frames

Published online by Cambridge University Press:  04 August 2017

Jean-Francois Lestrade ,
Robert A. Preston ,
Arthur E. Niell ,
Robert L. Mutel  and
Robert B. Phillips
Jean-Francois Lestrade
Affiliation:
(1) Bureau des Longitudes, Paris, France, on leave at the Jet Propulsion Laboratory, Pasadena, California
Robert A. Preston
Affiliation:
(2) Jet Propulsion Laboratory, Pasadena, California
Arthur E. Niell
Affiliation:
(2) Jet Propulsion Laboratory, Pasadena, California
Robert L. Mutel
Affiliation:
(3) Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa
Robert B. Phillips
Affiliation:
(4) Haystack Observatory, Westford, Massachusetts

Abstract

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VLBI observations of bright radio stars have been initiated in an attempt to measure the positions and proper motions of their radio components in order to tie the future HIPPARCOS stellar frame to a VLBI extragalactic reference frame. Through VLBI observations of a sample of 20 known radio stars we have identified 11 stars that should be appropriate for both astrometric VLBI and HIPPARCOS observations. Our measurements indicate that the angular extent of their radio emitting regions is small, i.e. < 3 milliarcseconds for 7 of them. Most of these radio stars belong to the RS Canum Venaticorum class of binary systems.

Type
X. Connections Between the Various Techniques
Information
Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 779 - 788
Copyright
Copyright © Reidel 1986 

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