Sub-Microarcsecond Astrometry and New Horizons in Relativistic Gravitational Physics

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dc.creatorKopeikin, Sergei M.
dc.creatorGwinn, Carl R.
dc.date2000-04-19
dc.date.accessioned2026-07-07T03:24:53Z
dc.date.available2026-07-07T03:24:53Z
dc.descriptionAttaining the limit of sub-microarcsecond optical resolution will completely revolutionize fundamental astrometry by merging it with relativistic gravitational physics. Beyond the sub-microarcsecond threshold, one will meet in the sky a new population of physical phenomena caused by primordial gravitational waves from early universe and/or different localized astronomical sources, space-time topological defects, moving gravitational lenses, time variability of gravitational fields of the solar system and binary stars, and many others. Adequate physical interpretation of these yet undetectable sub-microarcsecond phenomena can not be achieved on the ground of the "standard" post-Newtonian approach (PNA), which is valid only in the near-zone of astronomical objects having a time-dependent gravitational field. We describe a new, post-Minkowskian relativistic approach for modeling astrometric observations having sub-microarcsecond precision and briefly discuss the light-propagation effects caused by gravitational waves and other phenomena related to time-dependent gravitational fields. The domain of applicability of the PNA in relativistic space astrometry is explicitly outlined.
dc.description5 pages, the talk given at the IAU Colloquium 180 "Towards Models and Constants for Sub-Microarcsecond Astrometry", Washington DC, March 26 - April 2, 2000
dc.identifierhttps://arxiv.org/abs/gr-qc/0004064
dc.identifierhttp://arxiv.org/abs/gr-qc/0004064
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/33511
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleSub-Microarcsecond Astrometry and New Horizons in Relativistic Gravitational Physics
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