EAS Publications Series
Volume 6, 2003Observing with the VLTI
|Page(s)||3 - 3|
|Published online||31 January 2003|
G. Perrin and F. Malbet (eds)
EAS Publications Series, 6 (2003) 3
An introduction to interferometry
University of Cambridge, Astrophysics
Group, Cavendish Laboratory, Madingley Road, Cambridge, CB3 OHE, UK;
Corresponding author: email@example.com
In this paper I provide a brief introduction to astronomical interferometry at optical and infrared wavelengths. Two key concepts, central to understanding the basis and practice of interferometry are introduced: image formation with conventional telescopes, in particular the Fourier decomposition of images, and the nature and utility of measurements of the coherence function or mutual intensity. Thereafter I focus on optical/infrared interferometry, outlining how measurements of the coherence function are made at these wavelengths, how they can be used to interpret a source's structure, and what the principles of interferometric imaging tell us about the limitations expected for the current generation of arrays such as the VLTI.
© EAS, EDP Sciences, 2003
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