Vinicius Miranda Braganca
Graduate Student, Department of Astronomy and Astrophysics

Location: LASR

Scientific Advisor: Wayne Hu

Affiliations: Kavli Institute for Cosmological Physics

Publications: ADS | arXiv
Research Topic: Inflationary models. Current Projects: Planck constrains on fast oscillations in the curvature power spectrum.

Member of Research Groups:

Ph.D. Thesis Defense
Defense date: June 2, 2015
Ph.D. Thesis: "Probing Inflation with the Cosmic Microwave Background"

PhD Committee members: Scott Dodelson, LianTao Wang, Steve Meyer

Thesis Abstract: The existence of a quasi-deSitter expansion in the early universe, known as inflation, generates the seeds of large-scale structures and is one of the foundations of the standard cosmological model. The main observational predictions of inflation include the existence of a nearly scale-invariant primordial power spectrum that is imprinted on the cosmic microwave background (CMB), that has been corroborated with remarkable precision in recent years. Generalizations of the vanilla single-field slow-roll inflation provide a wealth of observational signatures in the power spectrum and the non-Gaussianity of fluctuations of the CMB, and this motivates a technique that can evaluate predictions of inflation beyond the slow-roll approximation called the generalized slow-roll (GSR). I will describe the latest searches for signatures of slow-roll violations in the Planck data using the GSR formalism, which is an ideal framework to probe inflationary models in this regime.