CHARLOT, P.

doi:10.1007/978-3-642-22795-0_9

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CHARLOT, P.
M2A 2012

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The Square Kilometre Array: Paving the way for the new 21st century radio astronomy paradigm, Astrophysics and Space Science Proceedings, ISBN 978-3-642-22794-3. Springer-Verlag Berlin Heidelberg, 2012, p. 85, The Square Kilometre Array: Paving the way for the new 21st century radio astronomy paradigm, Astrophysics and Space Science Proceedings, ISBN 978-3-642-22794-3. Springer-Verlag Berlin Heidelberg, 2012, p. 85. 2012p. 85

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For the past 20 years, VLBI has been unique in establishing celestial reference frames based on extragalactic objects and measuring motions and distances of objects within the Galaxy with unprecedented accuracies. However, it will be challenged soon by the upcoming Gaia space astrometry mission, which will observe a billion of galactic and extragalactic objects at optical wavelengths with similar or improved astrometric accuracies compared to VLBI. In the longer term, SKA may also play a major role in this area depending on whether it includes long baselines. The paper reviews recent highlights from astrometric VLBI along with expectations from the Gaia mission within the next decade. It also draws prospects for future synergies between radio and optical astrometry in this changing context.< Réduire

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Precision Astrometry: From VLBI to Gaia and SKA

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