Séminaire / Seminar GReCO |
| « How to model lensing due to the small-scale structure of the Universe » |
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P. Fleury |
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Cosmological observations are usually interpreted as if light propagated through a smooth, fluid-filled Universe. However, when point-like sources—such as supernovae—are at stake, the associated light beams are so narrow that the clumpy small-scale structure of our Universe may become more relevant that its large-scale structure.
In this talk, I will present two approaches for modeling and quantifying the effect of small scales on light propagation: Swiss-cheese models on the one hand, and stochastic techniques on the other hand. |
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lundi 8 juin 2015 - 11:00 Salle Entresol Daniel Chalonge Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |