Antoine Émile Henry Labeyrie
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Antoine Émile Henry Labeyrie (born 12 May 1943) is a French astronomer, who held the Observational astrophysics chair at the Collège de France between 1991 and 2014, where he is currently professor emeritus.[1][2] He is working with the Hypertelescope Lise association,[3] which aims to develop an extremely large astronomical interferometer with spherical geometry that might theoretically show features on Earth-like worlds around other suns, as its president.[4][5] He is a member of the French Academy of Sciences in the Sciences of the Universe (sciences de l'univers) section.[6] Between 1995 and 1999 he was director of the Haute-Provence Observatory.
Labeyrie graduated from the "grande école" SupOptique (École supérieure d'optique). He invented speckle interferometry,[7] and works with astronomical interferometers. Labeyrie concentrated particularly on the use of "diluted optics" beam combination or "densified pupils" of a similar type but larger scale than those Michelson used for measuring the diameters of stars in the 1920s, in contrast to other astronomical interferometer researchers who generally switched to pupil-plane beam combination in the 1980s and 1990s.
The main-belt asteroid 8788 Labeyrie (1978 VP2) is named in honor of Antoine Émile Henry Labeyrie and Catherine Labeyrie.[8] In 2000, he was awarded The Benjamin Franklin Medal.
Hypertelescope
Labeyrie has proposed the idea of an astronomical interferometer where the individual telescopes are positioned in a spherical arrangement (requiring them to be positioned to a fraction of a wavelength). This geometry reduces the amount of pathlength compensation required when re-pointing the interferometer array (in fact a Mertz corrector can be used rather than delay lines), but otherwise is little different from other existing instruments. He has suggested a space-based interferometer array much larger (and complex) than the Darwin and Terrestrial Planet Finder projects using this spherical geometry of array elements along with a densified pupil beam combiner, calling the endeavor a "Hypertelescope"[9] project. It might theoretically show features on Earth-like worlds around other stars. According to New Scientist:
See also
References
- Antoine Labeyrie, Resolved imaging of extra-solar planets with future 10–100 km optical interferometric arrays, Astronomy and Astrophysics Supplement Series 118 (1996), 517–24.
- Antoine Labeyrie, Snapshots of Alien Worlds – The Future of Interferometry, Science 285 (1999), 1864–65 (full text limited to subscribers).
- Tony Reichhardt, French Astronomer Designs Telescope of the Future, Space.com, 16 September 1999.
- Govert Schilling, The hypertelescope: a zoom with a view, New Scientist, n. 2540, 23 February 2006 (full text limited to subscribers, article contains some scientific misconceptions).
- Bruce Dorminey, Astronomers build hypertelescope in southern French alps, Forbes, 26 March 2012
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External links
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- ↑ http://m42app.com/hypertelescope/?page_id=48Template:Dead link
- ↑ http://www.academie-sciences.fr/archivage_site/academie/membre/Labeyrie_Antoine.htmTemplate:Dead link
- ↑ Attainment of Diffraction Limited Resolution in Large Telescopes by Fourier Analysing Speckle Patterns in Star Images, Labeyrie 1970,Astronomy and Astrophysics, Vol. 6, p. 85
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- ↑ Laboratoire pour l’Interférométrie Stellaire et Exoplanétaire: Hypertelescope Template:Webarchive