Submillimeter interferometry

Details Submillimeter interferometry Submillimeter interferometry

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.354...25l&link_type=abstract

In ESA, Targets for Space-Based Interferometry p 25-32 (SEE N93-31750 12-89)

Astronomy and Astrophysics

Astronomy

Astronomical Interferometry, Interferometers, Spaceborne Astronomy, Submillimeter Waves, Cosmology, Design Analysis, Lunar Based Equipment, Molecular Clouds, Solar System, Star Formation

Scientific paper

The scientific objectives in the submillimeter range (30 micrometers to 1 mm) are considered with emphasis on interferometry. Possible designs for a large space submillimeter astronomical interferometer are discussed and a strategy for their implementation is defined. The preferred design is a single large antenna or very compact interferometer on a single mount, surrounded by other antennas. The large diameter instrument is important in its own right. It will also bridge the resolution gap between smaller spaceborne instruments and larger interferometers. A large submillimeter antenna might also be useful as an optical/IR speckle telescope. The alternative possibility of a static phased array distributed on the lunar surface was examined and it was found that it would require an impractically large number of elements. It is noted that a polar site on the Moon, although attractive in several respects, has the problem that objects in our solar system will always be very close to, or below the horizon. An obvious and necessary precursor of a space submillimeter interferometer is a spaceborne submillimeter telescope like FIRST. Critical areas requiring major research and development studies are defined. The astronomical goals for submillimeter interferometry include solar system, circumstellar envelopes, interstellar matter, star formation, extragalactic and cosmological topics. The most interesting goals require observations in the 60 to 300 micrometer range, an angular resolution of 0.1 to 1 inch, and a collecting surface of several hundred square meters.

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