Séminaire / Seminar GReCO |
| « Braneworlds and Beyond: Can dark energy be modified gravity? » |
|
Arthur Lue |
| The nature of the fuel that drives today''s cosmic acceleration is an open and tantalizing mystery. I entertain the suggestion that the acceleration is not the manifestation of yet another new ingredient in the cosmic gas tank, but rather our first real lack of understanding of gravitational physics. I discuss first an intriguing braneworld model (Dvali-Gabadadze-Porrati) and extend the discussion to a more general context, addressing questions about modified gravity cosmologies, and allowing concrete distinctions to be made between modified gravity and dark energy at astrophysically-interesting, and even solar-system, scales, with these distinctions being subject to imminent observational discrimination. |
|
jeudi 25 mars 2004 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |