Skip to Main content Skip to Navigation
Theses

Propriétés physiques des premières étoiles et galaxies. Contraintes sur les modèles de formation des galaxies

Abstract : This thesis work is based on the data analysis from three main observational projects aimed at the detection and study of extremely distant astrophysical sources. The chosen fields were centered on galaxy clusters used as gravitational telescopes, thus taking benefit of the magnification effect. After introducing the cosmological context of this thesis and the gravitational lensing effect, I first present a search for Lyman-? emitters using blind spectroscopy of the most magnified regions of a galaxy clusters sample. I then describe a study on one particular distant (z~7) galaxy, observed by HST and Spitzer, for which I derive constraints on the physical properties. I finally give the results of a photometric research project for extremely distant objects, carried out using VLT telescopes in the near-infrared. From the whole sample of photometric candidates, it is possible to get constraints on the UV luminosity fonction and the cosmic star formation rate at very high z.
Complete list of metadata

https://tel.archives-ouvertes.fr/tel-00010464
Contributor : Johan Richard <>
Submitted on : Thursday, October 6, 2005 - 7:38:50 PM
Last modification on : Saturday, November 28, 2020 - 4:20:02 AM
Long-term archiving on: : Tuesday, September 7, 2010 - 5:16:16 PM

Identifiers

  • HAL Id : tel-00010464, version 1

Collections

Citation

Johan Richard. Propriétés physiques des premières étoiles et galaxies. Contraintes sur les modèles de formation des galaxies. Astrophysique [astro-ph]. Université Paul Sabatier - Toulouse III, 2005. Français. ⟨tel-00010464⟩

Share

Metrics

Record views

224

Files downloads

1112