The Interferometer in Radio Astronomy

Details The Interferometer in Radio Astronomy The Interferometer in Radio Astronomy

Dec 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968ieeep..56.2114s&link_type=abstract

Proceedings of the IEEE, Vol. 56, Issue 12, p. 2114-2130

Astronomy and Astrophysics

Astronomy

11

Scientific paper

A theory is developed for the response of a two-element radio interferometer to a partially coherent field, without restriction as to band-width or antenna properties. It is shown that for a completely incoherent source the narrow-band interferometer output is a component of the Fourier transform of the source brightness, which can therefore he mapped by repeated interferometer observations. A partially or completely coherent extended source, on the other hand, cannot be mapped by this technique. The history of radio interferometry in astronomy is discussed and examples are given of the current uses of the technique in the precise measurement of source positions, in the measurement of the diameters of extremely small sources, and in the detailed mapping of complex sources.

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