Astronomical Optical Interferometry. I. Methods and Instrumentation

Details Astronomical Optical Interferometry. I. Methods and Instrumentation Astronomical Optical Interferometry. I. Methods and Instrumentation

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010seraj.181....1j&link_type=abstract

Serbian Astronomical Journal, vol. 183, pp. 1-17

Astronomy and Astrophysics

Astronomy

1

Instrumentation: Interferometers, Methods: Observational, Techniques: High Angular Resolution

Scientific paper

Previous decade has seen an achievement of large interferometric projects including 8-10m telescopes and 100m class baselines. Modern computer and control technology has enabled the interferometric combination of light from separate telescopes also in the visible and infrared regimes. Imaging with milli-arcsecond (mas) resolution and astrometry with micro-arcsecond (muas) precision have thus become reality. Here, I review the methods and instrumentation corresponding to the current state in the field of astronomical optical interferometry. First, this review summarizes the development from the pioneering works of Fizeau and Michelson. Next, the fundamental observables are described, followed by the discussion of the basic design principles of modern interferometers. The basic interferometric techniques such as speckle and aperture masking interferometry, aperture synthesis and nulling interferometry are disscused as well. Using the experience of past and existing facilities to illustrate important points, I consider particularly the new generation of large interferometers that has been recently commissioned (most notably, the CHARA, Keck, VLT and LBT Interferometers). Finally, I discuss the longer-term future of optical interferometry, including the possibilities of new large-scale ground-based projects and prospects for space interferometry.

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