Thibault Damour

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Thibault Damour

Thibault Damour (born February 7, 1951 in Lyon ) is a French theoretical physicist who deals with general relativity , astrophysics and string theory.

Life

Damour studied from 1970 to 1974 at the École normal supérieure , with a degree in physics from the University of Paris VI in 1974 (diploma thesis on the theory of renormalization in quantum field theory ). At the same time he was at the Institut Henri Poincaré in Paris in 1973/4 and at Princeton University from 1974 to 1976 (as an ESA Fellow). In 1979 he received his doctorate from the University of Pierre and Marie Curie (University of Paris VI.) On the theory of black holes . From 1977 to 1981 he was a CNRS scientist in the theoretical astrophysics group at the Meudon Observatory . He stayed at the CNRS until 1992, since 1989 as a permanent professor at the IHES in Bures-sur-Yvette near Paris.

Damour was engaged in a. with the theoretical analysis of tests on general relativity (AR), etc. a. as head of the Theory team at Satellite Experiment Satellite Test of the Equivalence Principle (STEP) of the equivalence principle between 1991 and 1996. He was also a member of the advisory groups for basic research in the ESA and the French space agency.

He examined z. B. the two-body problem in AR with radiation of gravitational waves , important in the first detection of these waves in binary star systems with pulsars . With Alessandra Buonanno in 1999 he developed the Effective One Body Formalism for the analytical solution of black holes on the way to merging. This was later precisely the case of a source at which gravitational waves were first observed directly in the Ligo project in 2015. He also dealt with cosmological aspects of string theory. With Bernard Julia , Hermann Nicolai and Marc Henneaux , he showed that the disappearance of the chaotic behavior of the BKL singularities (after Evgeni Lifschitz , Wladimir Alexejewitsch Belinski , Isaak Markowitsch Chalatnikow ) in the general theory of relativity (with generalization in Kaluza-Klein theories from effective String theories) in more than 10 space-time dimensions is related to the non-existence of hyperbolic Kac-Moody algebras in these higher dimensions, which are responsible for the oscillating chaotic behavior.

Prices and memberships

He has been a corresponding member of the Académie des Sciences in Paris since 1994 and a full member since 1999 . In 2010 he was accepted as a full member of the Academia Europaea . In 2016 he was elected a member of the American Academy of Arts and Sciences .

literature

as an author
as editor
  • Einstein Aujourd'hui . EDP ​​Sciences / CNRS Editions. Les Ulis 2005, ISBN 2-271-06311-6 (together with Alain Aspect et al.).
  • with Bertrand Duplantier, Vincent Rivasseau: Gravitation and Experiment , Poincaré Seminar 2006, Birkhäuser Verlag, Basel 2007.

Public scientific controversy with Jean-Pierre Petit

On January 4, 2019 Damour, with Nathalie Deruelle and Luc Blanchet , published a detailed 7-page presentation of his critique of the field equations of Jean-Pierre Petit 's cosmological Janus model on his IHES page (more precisely, critique of 3 publications by Petit from 2014 and 2016), in response to a letter dated December 7, 2018 from Petit.

On March 13, 2019, Petit published a 54-page scientific appendix analyzing criticism of Damour, Blanchet, and Deruelle. The Janus model is specified: it evolves slightly to respect Bianchi's identities. The Janus model will now be described as derived from a variation method action. It has a new Lagrange derivative. These refinements of the model, which are common in physics, do not call into question the results obtained so far with regard to astronomical observations. This update of the Janus model is confirmed by a new scientific publication.

Web links

References

  1. ↑ Who's Who in France 2014. Qui est qui en France. Dictionaire biographique. Vol. 45. Levallois-Perret 2013, p. 658
  2. ↑ Published as Damour “Mechanical, electrodynamical and thermodynamical properties of black holes”, in C. Edwards (editor) “Gravitational Radiation, collapsed objects and exact solutions”, Springer, Lecture Notes in Physics, Vol. 124, 1980
  3. ^ Thibault Damour, Introductory lectures on the Effective One Body formalism , Int. J. Mod. Phys. A, Vol. 23, 2008, pp. 1130-1148
  4. ^ Membership directory: Thibault Damour. Academia Europaea, accessed September 1, 2017 .
  5. ^ American Academy of Arts and Sciences : Newly Elected Fellows. In: amacad.org. Retrieved April 22, 2016 .
  6. ↑ JP Petit, G. D'Agostini: Cosmological bimetric model with interacting positive and negative masses and two different speeds of light, in agreement with the observed acceleration of the Universe . In: Modern Physics Letters A . tape 29 , no. 34 , October 27, 2014, ISSN  0217-7323 , p. 1450182 , doi : 10.1142 / S021773231450182X ( worldscientific.com [accessed January 28, 2019]).
  7. ↑ JP Petit, G. d'Agostini: Negative mass hypothesis in cosmology and the nature of dark energy . In: Astrophysics and Space Science . tape 354 , no. 2 , December 1, 2014, ISSN  1572-946X , p. 611-615 , doi : 10.1007 / s10509-014-2106-5 .
  8. ↑ https://www.researchgate.net/profile/Bruno_Paul/project/Cosmology-45/attachment/5c26456ccfe4a764550c3d5e/AS:708839905193986@1546012011304/download/le_modele_cosmologique_janus-nov2016.Logject .Upextdates=Upextdates= Upextdates
  9. ↑ http://www.ihes.fr/~damour/publications/JanusJanvier2019-1.pdf
  10. ↑ http://www.jp-petit.org/papers/cosmo/2019-janus-27.pdf
  11. ↑ https://www.youtube.com/watch?v=TtP4_I1aDzI
  12. ↑ JPPetit, G.D'Agostini, and N.Debergh: Physical and mathematical consistency of the Janus Cosmological Model (JCM) . In: Progress in Physics . tape 15 , no. 1 , February 1, 2019 ( jp-petit.org [PDF]).
personal data
SURNAME Damour, Thibault
BRIEF DESCRIPTION French theoretical physicist
DATE OF BIRTH February 7, 1951
PLACE OF BIRTH Lyon