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Proceedings Paper

Adaptive optics and aperture masking: a comparison
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Paper Abstract

We present a comparative study of aperture-masking on the Keck-I telescope and adaptive optics with the Keck-II telescope. Recent results from an aperture-masking program at the Keck Observatory in the near-infrared amply demonstrate that this method occupies an important niche in achieving diffraction-limited images despite the many advances in adaptive optics technology. Examples of the efficacy of aperture-masking are the images of the persistent dust-producing Wolf-Rayet star WR 104 and the massive young star with IR excess, MWC 349A. Both these objects were resolved, providing fundamental new insights into their nature. Here we present images of these objects made using adaptive optics in the same wavelength band. These provide a unique opportunity for a direct comparison of two important and competing techniques for ground-based high-resolution imaging. From the AO images, we are unable to recover the gross morphology or detail seen in the aperture-masking results. We note that the AO program might have been hindered by less than ideal observing conditions.

Paper Details

Date Published: 20 October 2004
PDF: 9 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552170
Show Author Affiliations
Jayadev K. Rajagopal, NASA Goddard Space Flight Ctr. (United States)
Richard Barry, NASA Goddard Space Flight Ctr. (United States)
Bruno Lopez, Observatoire de la Cote d'Azur (France)
William C. Danchi, NASA Goddard Space Flight Ctr. (United States)
John D. Monnier, Univ. of Michigan (United States)
Peter G. Tuthill, Univ. of Sydney (Australia)
Charles H. Townes, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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