Radio stars as connecting link of the HIPPARCOS and Very Long Baseline Interferometry (VLBI) reference frames

Astronomy and Astrophysics – Astronomy

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Astrometry, Celestial Reference Systems, Esa Satellites, European Space Programs, Radio Stars, Very Long Base Interferometry, Angular Distribution, Astronomical Catalogs, Radio Emission, Reference Stars, Stellar Magnitude, Stellar Motions

Scientific paper

The use of radio star dual frequency emission to relate Hipparcos and VLBI reference frames is discussed. The physical basis of the connection is examined, using optical and radio data. Thirty stars brighter than magnitude 11 are identified as possible transfer stars, after applying brightness, angular separation, magnitude variation, and radio interferometric sensitivity criteria to 143 stars in the Wendker 1981 catalog. For six of the stars chosen, ground based optical observation of position and proper motion are needed to meet Hipparcos input catalog specifications.

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