Study of the power spectrum super sample covariance with lognormal simulations

• Grant number: 19/12699-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2019
• End date: December 31, 2019
• Field of knowledge: Physical Sciences and Mathematics - Astronomy
• Principal Investigator: Rogério Rosenfeld
• Grantee: Lucas James Faga
• Host Institution: Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil
• Associated research grant: 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics, AP.ESP

Abstract

The estimation of cosmological parameters from observations allow to determine the best model that describes our universe. A crucial step in this process is the estimation of the errors associated to the measurements, codified in the covariance matrix. In this Project the student will focus on a theoretical study of the covariance matrix that takes into account the contribution of super-horizon modes in the so-called super-sample covariance. In particular he will verify the theoretical estimate using the response function formalism with separate universe lognormal simulations.