Integrated Sachs-Wolfe effect and the signal-to-noise ratio of the CMB-galaxies cross-correlation

• Grant number: 22/02874-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2022
• End date: May 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Edivaldo Moura Santos
• Grantee: Bruno Cordeiro e Almeida Fernandes
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

We propose an undergraduate research project whose goal is to determine the general characteristics of a hypothetical survey of galaxies, such that the correlation between the CMB temperature and the galaxy distribution in our universe is maximized. Such a correlation is induced by the so-called integrated Sachs-Wolfe effect and is a direct consequence of the time variation of gravitational potentials induced during the transition from a non-relativistic matter-dominated universe to dark energy-dominated one, as indicated by measurements of luminosity distances and recession velocities of type IA supernovae. The student has to dominate the physics related to the integrated Sachs-Wolfe effect through a study program focused on General Relativity and Cosmology, and at the end be capable of solving the optimization problem aforementioned.(AU)