Spatial interferometry in the mid-infrared region

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astrometry, Infrared Astronomy, Infrared Interferometers, Interferometry, Atmospheric Effects, Heterodyning, High Resolution, Infrared Windows, Point Spread Functions, Refractivity, Stellar Envelopes, Telescopes

Scientific paper

The potential of high-resolution spatial interferometry for detailed mapping and precision astrometry in the mid-infrared region, somewhat analogous to interferometry now done in the microwave region, is discussed from an instrumental point of view. Some results from a prototype system and from tests of atmospheric properties are given. The design of a more advanced two-telescope system now under construction is outlined. This involves movable telescopes of 1.65 m aperture and of high precision, using heterodyne detection of infrared in the 10 μm atmospheric window.

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