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Paper Abstract

The Mauna Kea Observatory offers a unique opportunity to build a large and sensitive interferometer. Seven telescopes have diameters larger than 3 meters and are or may be equipped with adaptive optics systems to correct phase perturbations induced by atmospheric turbulence. The maximum telescope separation of 800 meters can provide an angular resolution as good as 0.25 milli-arcseconds in the J band. The large pupils and long baselines make 'OHANA very complementary to existing large optical interferometers. From an astrophysical point of view, it opens the way to imaging of the central part of faint and compact objects such as active galactic nuclei and young stellar objects. On a technical point of view, it opens the way to kilometric or more arrays by propagating light in single-mode fibers. First instruments have been built and tested successfully at CFHT, Keck I and Gemini to inject light into single-mode fibers thus partly completing Phase I of the project. Phase II is now on-going with the prospects of the first combinations of Keck I - Keck II in 2004 and Gemini - CFHT in 2005.

Paper Details

Date Published: 20 October 2004
PDF: 14 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.551585
Show Author Affiliations
Guy S. Perrin, Observatoire de Paris-Meudon (France)
Olivier Lai, Canada-France-Hawaii Telescope Corp. (United States)
Julien M. Woillez, W.M. Keck Observatory (France)
Jean Guerin, LESIA, Observatoire de Paris-Meudon (France)
Takayuki Kotani, LESIA, Observatoire de Paris-Meudon (France)
Sebastien Vergnole, Institut de Recherche en Communications Optiques et Microondes (France)
Andrew J. Adamson, Joint Astronomy Ctr. (United States)
Christ Ftaclas, Univ. of Hawaii (United States)
Olivier Guyon, Subaru Telescope/National Astronomical Observatory of Japan (United States)
Pierre J. Lena, LESIA, Observatoire de Paris-Meudon (France)
Jun Nishikawa, National Astronomical Observatory of Japan (Japan)
Francois Reynaud, Institut de Recherche en Communications Optiques et Microondes (France)
Katherine C. Roth, Gemini Observatory (United States)
Stephen T. Ridgway, LESIA, Observatoire de Paris-Meudon (France)
National Optical Astronomy Observatories (United States)
Alan T. Tokunaga, Univ. of Hawaii (United States)
Peter L. Wizinowich, W.M. Keck Observatory (United States)

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

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