Michelson interferometry with Keck I

Peter G. Tuthill; John D. Monnier; William C. Danchi; Christopher A. Haniff

doi:10.1117/12.317120

24 July 1998 Michelson interferometry with Keck I

Peter G. Tuthill, John D. Monnier, William C. Danchi, Christopher A. Haniff

Proceedings Volume 3350, Astronomical Interferometry; (1998) https://doi.org/10.1117/12.317120
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

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.

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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); https://doi.org/10.1117/12.317120

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