OHANA

Guy Perrin, Olivier Lai, Julien Woillez, Jean Guerin, Takayuki Kotani, Sébastien Vergnole, Andy J. Adamson, Christ Ftaclas, Olivier Guyon, Pierre Léna, Jun Nishikawa, François Reynaud, Kathy Roth, Stephen T. Ridgway, Alan T. Tokunaga, Peter L. Wizinowich

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

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.

Original languageEnglish (US)
Article number43
Pages (from-to)391-404
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5491
Issue numberPART 1
DOIs
StatePublished - Dec 1 2004
Externally publishedYes
EventNew Frontiers in Stellar Interferometry - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004

Keywords

  • Adaptive Optics
  • Interferometry
  • OHANA
  • Single-mode fiber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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