1. Groundbased optical and radio astrometry of Hipparcos extragalactic link objects
- Author
-
N. Zacharias, Chr. de Vegt, and Kenneth J. Johnston
- Subjects
Physics ,Atmospheric Science ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Instrumentation and Methods for Astrophysics ,Aerospace Engineering ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Astrometry ,Stars ,Geophysics ,Space and Planetary Science ,General Earth and Planetary Sciences ,Astrophysics::Earth and Planetary Astrophysics ,Link (knot theory) ,Astrophysics::Galaxy Astrophysics ,Reference frame - Abstract
The construction of a new extragalactic all-sky reference frame based on groundbased high precision optical and radio astrometry of selected compact radio sources and radio stars has been started in 1987 as a joint longterm project involving several astrometric facilities in both hemispheres. At present this system is based on a masterlist of about 400 extragalactic sources, mostly displaying optical counterparts and about 100 radio stars. A progress report is given with special view to an application for the HIPPARCOS extragalactic reference link.
- Published
- 1991
- Full Text
- View/download PDF