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24 July 1998 Michelson interferometry with Keck I
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We have used the technique of aperture masking to transform the 10m Keck telescope into a separate-element, multiple aperture Michelson interferometer. This has allowed a dramatic gain in signal-to-noise to be achieved as compared to conventional full-pupil interferometry for bright targets such as evolved giant and supergiant stars. Preliminary results from a program of near-IR diffraction-limited imaging of such stars are presented. Multi-wavelength images in the IR JHK and L bands have revealed complex and asymmetric morphologies in the inner dust shells surrounding a number of proto-typical dust-enshrouded IR stars. In addition, we have imaged the stellar photospheres of some of our largest target stars, allowing us to measure diameters and search for structure, such as giant convective cells, on the stellar surface.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter G. Tuthill, John D. Monnier, William C. Danchi, and Christopher A. Haniff "Michelson interferometry with Keck I", Proc. SPIE 3350, Astronomical Interferometry, (24 July 1998);


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