Roger Cayrel
Roger Victor Émile Cayrel (4 December 1925 – 11 January 2021) was a French astronomer. His main interests were stellar atmospheres, galactic chemical evolution and metal-poor stars.[1]
Biography
Born in Bordeaux, France, he attended the Lycée Michel-Montaigne in Bordeaux and studied physics at the École normale supérieure and the Faculté des sciences de Paris.
Beside his scientific work, he had a number of high-ranking posts in the management of science: director of the Canada-France-Hawaii Telescope (CFHT, 1974–1980), president of the IAU commission on stellar atmospheres (1973–1976) and head of the Bureau des Longitudes (1995–1996).
Cayrel was a corresponding member of the Académie des Sciences from 1988 to 2021. He was awarded the Prix Jules Janssen of the Société astronomique de France (Astronomical Society of France), in 2001.
Cayrel and his colleagues discovered thorium and uranium in the ultra-metal-poor halo star BPS CS31082-0001, which was named Cayrel's Star to honour him. From the thorium and uranium content, an age of 12.5 Billion years could be calculated.
Since 1954, he was married to the Italian astronomer Giusa de Strobel.
References
- ^ "Roger Cayrel". L'Académie des sciences. Retrieved 23 January 2021.
Sources
- Cayrel, R.; Hill, V.; Beers, T. C.; Barbuy, B.; Spite, M.; Spite, F.; Plez, B.; Andersen, J.; Bonifacio, P.; François, P.; Molaro, P.; Nordström, B.; Primas, F., Measurement of stellar age from uranium decay, Nature, Volume 409, Issue 6821, pp. 691–692 (2001)
- Jugaku, Jun. "The Publications And Citations Of Giusa And Roger Cayrel", Astrophysics and Space Science 265, 3(1999).
- Articles with short description
- Short description is different from Wikidata
- Articles with ISNI identifiers
- Articles with VIAF identifiers
- Articles with WorldCat Entities identifiers
- Articles with BNF identifiers
- Articles with BNFdata identifiers
- Articles with J9U identifiers
- Articles with LCCN identifiers
- Articles with NKC identifiers
- Articles with NTA identifiers
- Articles with SUDOC identifiers
- 1925 births
- 2021 deaths
- 20th-century French astronomers
- Members of the French Academy of Sciences
- École Normale Supérieure alumni
- All stub articles
- French astronomer stubs