The large scale structures. A window on the dark components of the Universe
type: Dataset
description: The dark energy is one of the great mysteries of modern cosmology, responsible for the current acceleration of the expansion of our Universe. Its study is a major focus of my thesis : the way I choose to do so is based on the large-scale structure of the Universe, through a probe called the integrated Sachs-Wolfe effect (iSW). This effect is theoretically detectable in the cosmic microwave background (CMB) : before reaching us this light travelled through large structures underlain by gravitational potentials. The acceleration of the expansion stretches and flattens these potentials during the crossing of photons, changing their energy, in a way that depend on the properties of the dark energy. The iSW effect only has a weak effect on the CMB requiring the use of external data to be detectable. A conventional approach is to correlate the CMB with a tracer of the distribution of matter, and therefore the underlying potentials. This has been attempted numerous times with galaxies surveys but the measured correlation has yet to give a definitive result on the detection of the iSW effect. This is mainly due to the shortcomings of current surveys that are not deep enough and/or have a too low sky coverage. A part of my thesis is devoted to the correlation of FDC with another diffuse background, namely the cosmological infrared background (CIB), which is composed of the integrated emission of the non-resolved distant galaxies. I was able to show that it is an excellent tracer, free from the shortcomings of current surveys. The levels of significance for the expected correlation CIB-CMB exceed those of current surveys, and compete with those predicted for the future generation of very large surveys. In the following, my thesis was focused on the individual imprint in the CMB of the largest structures by iSW effect. My work on the subject first involved revisiting a past study of stacking CMB patches at structures location, using my own protocol, completed and associated wi…
landing page: https://theses.hal.science/tel-00933818
identifier: NNT: 2013PA112243
keyword: cosmic-microwave-background
keyword: cosmologie
keyword: cosmology
keyword: dark-energy
keyword: energie-sombre
keyword: fond-diffus-cosmologique
keyword: infoeu-reposemanticsdoctoralthesis
keyword: large-scale-structures
keyword: sduothersciences-of-the-universe-physicsother
keyword: structures-a-grande-echelle
keyword: theses
issued: 2026-05-07T08:08:48.546532
modified: 2026-05-07T08:08:48.546540
language: en
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

The large scale structures. A window on the dark components of the Universe
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00933818
issued: 2026-05-07T08:08:48.549082
modified: 2026-05-07T08:08:48.513050