Antoine Émile Henry Labeyrie Explained

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:

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Notes and References

  1. Web site: Accueil - Collège de France.
  2. Web site: Collège de France - Biography.
  3. Web site: Hypertelescope . 29 March 2023 . Hypertelescope.
  4. Govert Schilling . Govert Schilling . The hypertelescope: a zoom with a view . New Scientist . 23 February 2006.
  5. http://m42app.com/hypertelescope/?page_id=48{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }}
  6. http://www.academie-sciences.fr/archivage_site/academie/membre/Labeyrie_Antoine.htm{{dead link|date=October 2016 |bot=InternetArchiveBot |fix-attempted=yes }}
  7. http://articles.adsabs.harvard.edu/full/1970A%26A.....6...85L 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
  8. Book: Lutz. Schmadel. Dictionary of Minor Planet Names: Addendum to 6th Edition: 2012–2014. 86. 9783319176772. 2015. Springer .
  9. https://lise.oca.eu/spip.php?rubrique78 Laboratoire pour l’Interférométrie Stellaire et Exoplanétaire: Hypertelescope

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