Ernest Esclangon

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anonymous portrait of Esclangon

Ernest Benjamin Esclangon (born March 17, 1876 in Mison near Sisteron , † January 28, 1954 in Eyrenville , Dordogne ) was a French astronomer, physicist and mathematician.

Esclangon studied from 1895 to 1898 at the École normal supérieure , then worked as an astronomer at the observatory in Bordeaux and received his doctorate in Paris in 1904 (on quasi-periodic functions). In 1918 he became director of the observatory in Strasbourg and in 1919 professor of astronomy at the University of Strasbourg . From 1929 he was director of the observatory in Paris and the Bureau International de l'Heure . He was also a member of the Bureau des Longitudes from 1932 . In 1944 he retired.

As a mathematician he was a pioneer in the study of quasi-periodic functions (independent of Piers Bohl ), which were later treated in detail by Harald Bohr as almost periodic functions . During the First World War, he dealt with ballistics and found a method of localizing the location of guns acoustically. In 1933 he organized a time announcement as a telephone service in Paris. As an astronomer, he improved the passage instruments .

In 1935 he received the Jules Janssen Prize , in 1929 he was elected to the Académie des sciences . The asteroid Esclangona is named after him, as is the lunar crater Esclangon and a street in Paris.

Web links

Individual evidence

  1. ^ List of members since 1666: Letter E. Académie des sciences, accessed on November 11, 2019 (French).
  2. ↑ http://www.v1.paris.fr/CARTO/nomenclature/3361.nom.html ( Memento from August 12, 2007 in the Internet Archive )
personal data
SURNAME Esclangon, Ernest
ALTERNATIVE NAMES Esclangon, Ernest Benjamin (full name)
BRIEF DESCRIPTION French astronomer, physicist and mathematician
DATE OF BIRTH March 17, 1876
PLACE OF BIRTH Mison at Sisteron
DATE OF DEATH January 28, 1954
Place of death Eyrenville , Dordogne department