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Astrophysics Colloquium: Wenjuan Fang, UIUC: "Probing the Universe's Accelerated Expansion with Current Data"

Event Type
Astronomy Department
134 Astronomy
Mar 26, 2013   4:00 pm  
Wenjuan Fang, UIUC
Originating Calendar
Astronomy Colloquium Speaker Calendar

Current standard cosmological models involve two accelerated phases of expansion of the Universe: one at the very beginning--inflation, the other at the late time--cosmic acceleration. Both phenomena indicate new physics, and have motivated various models being studied in the literature. It is important to test these models against cosmological observations. In this talk, I will explicitly show how current data can be used to put constraints on two typical models for the Universe's accelerated expansion, i.e., the DGP modified gravity model for cosmic acceleration, and the class of inflationary models that generate the local-type primordial non-Gaussianity.

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