Publié sur Groupe de Physique des Particules (http://www.lps.umontreal.ca)

Accueil > The quadrupole formula: a hundred years later

The quadrupole formula: a hundred years later

Béatrice Bonga
Perimeter Institute for Theoretical Physics
Résumé: 

Einstein’s celebrated quadrupole formula lies at the foundation of the first indirect evidence for gravitational waves: it explains with high precision the shrinking of the orbital radius of the Hulse-Taylor system. The formula expresses the power radiated in the form of gravitational radiation in terms of the source quadrupole moments. However, the derivation assumes a flat spacetime background, but there is strong observational evidence for a positive cosmological constant. To account for this, the quadrupole formula is generalized by replacing the flat spacetime background with a de Sitter spacetime. In this talk, I will focus on the conceptual subtleties that arise and comment on physical implications.

Date: 
Mardi, 21 Novembre, 2017 - 11:00
Lieu de Séminaire: 
Z-209, Pav. Claire-McNicholl
Café et biscuits: 
V-215 10:45, coffee and cookies
Transparents: 
PDF icon Montreal-pdf.pdf [1]

URL source: http://www.lps.umontreal.ca/fr/seminar/quadrupole-formula-hundred-years-later

Liens:
[1] http://www.lps.umontreal.ca/sites/default/files/Montreal-pdf.pdf