Cosmological evolution of the physical properties of galaxies
type: Distribution
access URL: https://theses.hal.science/tel-00090655
format: HTML
issued: 2026-05-08T04:31:17.188131
modified: 2026-05-08T04:31:17.141916

Cosmological evolution of the physical properties of galaxies
type: Dataset
contact point: Organization
  fn: CCSD
keyword: galaxy-evolution
keyword: photometry
keyword: sduastrsciences-of-the-universe-physicsastrophysics-astro-ph
keyword: outils-automatiques
keyword: automatic-tools
keyword: grands-releves
keyword: sdss
keyword: 2dfgrs
keyword: taux-de-formation-detoiles
keyword: vvds
keyword: theses
keyword: spectroscopy
keyword: evolution-des-galaxies
keyword: formation-des-galaxies
keyword: galaxy-formation
keyword: infoeu-reposemanticsdoctoralthesis
keyword: relation-masse-metallicite
keyword: spectroscopie
keyword: large-surveys
keyword: photometrie
keyword: star-formation-rate
keyword: classification-spectrale
keyword: mass-metallicity-relation
keyword: spectral-classification
landing page: https://theses.hal.science/tel-00090655
description: The study of galaxy formation and evolution is one of today's hotest topics. Two large surveys (2dFGRS, SDSS), bearing on several million local galaxies, recently allowed important statements in the comprehension of the physical properties of galaxies. In addition, new 8-10m diameter telescopes, equipped with multi-objects spectrographs (VLT/VIMOS, Keick/DEIMOS, Gemini/GMOS, ...), have given the opportunity to start new large surveys dedicated on distant galaxies (VVDS, DEEP2, GDDS, zCOSMOS, ...), therefore located in a younger universe. This thesis work preferentially concerns the study of the mass-metallicity or luminosity-metallicity relations, which are able to establish a bond between the two major processes responsible for the evolution of galaxies: stellar mass assembly (star formation or merging processes) and the chemical enrichment of the interstellar medium by successive generations of stars. We show that the shape of this relation is a very good way to test the models of galaxy formation and evolution. We study the reference of the luminosity-metallicity relation, obtained in the local universe with the 2dFGRS survey. Then we study the evolution, as a function of universe age, of the luminosity-metallicity relation using a small sample (LCL05), and the mass-metallicity relation using the VVDS large survey. Several results obtained with these various samples are evidences in favour of the hierarchical model: the most massive galaxies would be formed by progessive merging of smaller galaxies. The physical properties of a large number of galaxies are estimated using automatic tools specifically developed, or adapted to our needs, during this thesis. As additional results, new calibrations of the spectral classification or the star formation rate of galaxies are obtained with the local universe large surveys (respectively 2dFGRS and SDSS). This work offers many possibilities for new results thanks to the amount of available data and its diversity.
issued: 2026-05-08T04:31:17.168632
language: fr
modified: 2026-05-08T04:31:17.168637

test_moissonnage_selune
type: Agent