Résumé / Abstract Seminaire_GReCO

"The role of intergalactic gray dust absorption and future SN Ia surveys"

P. S. Corasaniti
Lab. Univers et Théories (LUTH), Obs. Paris-Meudon-Nancay (Meudon, France)

In the future astronomical surveys will provide larger sample of SN Ia observations to measure luminosity distances with few per cent uncertainties. This will improve our current constraints on dark energy and eventually open up a new window on the physics of this exotic phenomenon. For this to be possible source of systematic errors need to be identified and reduced. In this talk I will discuss the extinction by dust particles present in the Intergalactic Medium and the effects on dark energy parameter inference. I will also describe alternative tests to isolate this systematic effect and evaluate its amplitude with angular correlation measurements of supernova flux fluctuations across the sky.

lundi 14 mai 2007 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage