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Astron. Astrophys. 340, 305-308 (1998)


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Hipparcos based astrometric analysis of M 3 and M 92 fields: optical identification of X-ray and radio sources, space motions of globular clusters M 3 and M 92 and a galactic orbit of the sdB star PG 1716+426

M. Geffert

Sternwarte der Universität Bonn, Auf dem Hügel 71, D-53121 Bonn, Germany

Received 27 July 1998 / Accepted 15 September 1998

Abstract

We present positions and proper motions with respect to the Hipparcos system of stars in the fields of the globular clusters M 3 and M 92. The data were used for the optical identification of X-ray and radio sources, a new determination of the absolute proper and space motions of the globular clusters M 3 and M 92. Moreover, we derived an accurate proper and space motion of the sdB star PG 1716+426, located in the M 92 field.

Key words: stars: individual: PG 1716+426 – globular clusters: individual: M 3 – globular clusters: individual: M 92

Send offprint requests to: M.  Geffert

© European Southern Observatory (ESO) 1998

Online publication: November 3, 1998

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