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Proceedings Paper

HARDI-2: a high-angular-resolution deployable interferometer for UV observations of nearby stars
Author(s): Pierre Y. Bely; Christopher J. Burrows; H. J. Lamers; Francois J. Roddier; Gerd Weigelt
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Paper Abstract

We describe a concept for an orbiting astronomical observatory which will allow high spatial resolution far-UV observations of nearby stars. The scientific goal is to study stellar activity and mass loss using imaging and spectroscopy. Specific areas of study include stellar surfaces, large scale magnetohydroynamic effects, interacting binaries and stellar winds. The instrument is an interferometer with an 8-meter baseline providing 3 milliarcseconds resolution at 1200 Angstrom. The interferometer configuration is of the Fizeau type which affords excellent ultraviolet throughput because of the small number of reflections. The collecting aperture is composed of six 0.6 meter diameter elements distributed on a circle in such a way as lead to near uniform u-v plan coverage when the instrument is rotated around the line of sight. This will lead to excellent imaging capabilities. The interferometer individual channels are kept coaligned and coherent using the light of a nearby guide star. The supporting structure is folded for launch and automatically deployed once on orbit. To minimize disturbance torques and thermal shocks, the spacecraft will be located on a high earth orbit or at the Lagrangian point.

Paper Details

Date Published: 10 September 1993
PDF: 5 pages
Proc. SPIE 1947, Spaceborne Interferometry, (10 September 1993); doi: 10.1117/12.155754
Show Author Affiliations
Pierre Y. Bely, Space Telescope Science Institute (United States)
Christopher J. Burrows, Space Telescope Science Institute (United States)
H. J. Lamers, SRON Lab. for Space Research (Netherlands)
Francois J. Roddier, Institute for Astronomy/Honolulu (United States)
Gerd Weigelt, Max-Planck-Institut fuer Radioastronomie (Germany)

Published in SPIE Proceedings Vol. 1947:
Spaceborne Interferometry
Robert D. Reasenberg, Editor(s)

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