Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..16e...1c&link_type=abstract
Nomenclature, Precession and New Models in Fundamental Astronomy, 26th meeting of the IAU, Joint Discussion 16, 22-23 August 200
Astronomy and Astrophysics
Astronomy
Scientific paper
The series of resolutions passed by the International Astronomical Union at its General Assemblies in 1997 and 2000 are the most significant set of international agreements in fundamental astronomy in several decades. These resolutions concern the definition of the astronomical reference systems and transformations between them, which are required when dealing with the Earth's rotation or when computing directions of celestial objects in various systems. Continuing efforts have been made since 2000 to implement these resolutions, and to prepare a well defined terminology and high accuracy models associated with this implementation. The adopted reference systems and the high-accuracy models which have been recently developed make possible various scientific applications in a number of fields of astronomy. Joint Discussion 16 entitled "Nomenclature, Precession and new models in Fundamental Astronomy. Applications and scientific contribution to astronomy" has two objectives. One objective is to introduce the general astronomical community to the state of the art in the implementation of the IAU resolutions, the nomenclature in fundamental astronomy and the high-accuracy models for precession, the ecliptic and other astrometric models for reducing high-accuracy observations. Another objective is the presentation of scientific applications of high accuracy astrometric observations, models and accurate realizations of reference systems for ephemerides, celestial mechanics, astrometry, Earth rotation, time and radio-astronomy. This JD is composed of the six following sessions, each of them consisting of a few invited talks, and oral and poster contributions: 1: State of the art of the implementation of the IAU Resolutions and the ICRS; 2: Precession and the Ecliptic; 3: High accuracy models for reducing astronomical observations; 4: New terminology in fundamental astronomy, time and relativity; 5: Scientific applications of high accuracy astronomy; 6: General discussion and educational efforts.
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