Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...306l..13b&link_type=abstract
Astronomy and Astrophysics, v.306, p.L13
Astronomy and Astrophysics
Astrophysics
84
Techniques: Interferometric, Telescopes, Binaries: Close, Stars: Imaging
Scientific paper
We present the first aperture synthesis maps obtained using closure phase techniques with a separated-element optical interferometer. Maps of the double-lined spectroscopic binary Capella (α Aurigae) were obtained at 830nm with three elements of the Cambridge Optical Aperture Synthesis Telescope (COAST) in September 1995. These maps show clearly the milliarcsecond orbital motion of the system over a 15 day interval. The image quality is comparable to that of VLBI images obtained using similarly sparse radio synthesis arrays, and the location and motion of the binary components are in excellent agreement with the predictions of the latest set of orbital elements. These data demonstrate for the first time the feasibility of operating long-baseline optical/near-infrared interferometers for high-dynamic range high-resolution imaging.
Baldwin John E.
Beckett Martin G.
Boysen Roger C.
Burns David
Buscher David F.
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