SAIFR:3436

Testing cosmic inflation using galaxies

(2023). Testing cosmic inflation using galaxies. ICTP South American Institute for Fundamental Research. https://scivideos.org/ictp-saifr/3436

Testing cosmic inflation using galaxies. ICTP South American Institute for Fundamental Research, May. 02, 2023, https://scivideos.org/ictp-saifr/3436 

          @misc{ scivideos_SAIFR:3436,
            doi = {},
            url = {https://scivideos.org/ictp-saifr/3436},
            author = {},
            keywords = {ICTP-SAIFR, IFT, UNESP},
            language = {en},
            title = {Testing cosmic inflation using galaxies},
            publisher = { ICTP South American Institute for Fundamental Research},
            year = {2023},
            month = {may},
            note = {SAIFR:3436 see, \url{https://scivideos.org/ictp-saifr/3436}}
          }
Alexandre Barreira
Talk numberSAIFR:3436
Source RepositoryICTP – SAIFR
Collection
Talk Type Conference
Subject

Abstract

While it is relatively widely accepted that cosmic inflation took place, the actual physics behind it are still elusive. One of the main open questions concerns the number of degrees of freedom active during inflation, which can be answered through searches for primordial non-Gaussianity and isocurvature perturbations. Analyses of cosmic microwave background (CMB) data could not provide definite answers, but future large-scale structure (LSS) surveys are expected to do so by piercing into the theoretically interesting parameter space regions. In this lecture I will describe how galaxy clustering data can be used to very efficiently probe primordial non-Gaussianity and isocurvature. I will focus in particular on the special role played by the phenomenon of "galaxy bias", which has been overlooked in the past, but which must be understood significantly better to let us both (i) robustly constrain inflation models and (ii) optimize our galaxy observations for tests of inflation.