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1986•Symposium - International Astronomical UnionOpen access

Speckle Interferometry in Astrometry

Harold A. McAlister

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Abstract

Speckle interferometry, which is characterised by diffraction limited resolution and enhanced accuracy, offers a wide range of possibilities for astrometry. Speckle applications are limited by the constraint of isoplanicity with the result that only differential rather than absolute astrometry can be carried out with the technique. Nevertheless, potentially important applications exist in solar system and stellar astrometry, but speckle interferometry has so far made significant contributions only in binary star astrometry.

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Speckle interferometry, which is characterised by diffraction limited resolution and enhanced accuracy, offers a wide range of possibilities for astrometry. Speckle applications are limited by the constraint of isoplanicity with the result that only differential rather than absolute astrometry can be carried out with the technique. Nevertheless, potentially important applications exist in solar system and stellar astrometry, but speckle interferometry has so far made significant contributions only in binary star astrometry.

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Available abstract

Speckle interferometry, which is characterised by diffraction limited resolution and enhanced accuracy, offers a wide range of possibilities for astrometry. Speckle applications are limited by the constraint of isoplanicity with the result that only differential rather than absolute astrometry can be carried out with the technique. Nevertheless, potentially important applications exist in solar system and stellar astrometry, but speckle interferometry has so far made significant contributions only in binary star astrometry.

Key concepts: Astrometry, Speckle pattern, Speckle imaging, Physics, Interferometry, Remote sensing, Optics, Astronomy

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