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Doctoral thesis
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English

Photometric redshift estimations in large multi-wavelength surveys and application to galaxy cluster property studies

ContributorsDesprez, Guillaume
Imprimatur date2022-03-29
Defense date2022-03-18
Abstract

The redshift is an observable quantity which is linked to both the distances that separate us from extragalactic sources and to the Universe’s cosmology. To constrain the nature of the dark universe (i.e., dark energy and dark matter) large cosmological surveys, such as the Euclid survey, require measuring redshifts for billions of galaxies. Such kind of mission must rely on photometric redshifts, which in return must have the best precision and accuracy possible. I this thesis, I worked on the validation and the improvements of the photometric redshift measurement methods planned for Euclid mission. I also explored novel methods to extract the photometry in large survey images, and to combine the data of different surveys in a configuration close to the expected Euclid one. Moreover, I investigated the possibility to use such kind of data to study the evolution of galaxies in dense environments.

eng
Keywords
  • Photometric redshifts
  • Galaxy evolution
  • Cosmology
  • Photometry
  • Large surveys
Citation (ISO format)
DESPREZ, Guillaume. Photometric redshift estimations in large multi-wavelength surveys and application to galaxy cluster property studies. 2022. doi: 10.13097/archive-ouverte/unige:160101
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Technical informations

Creation04/05/2022 2:35:00 PM
First validation04/05/2022 2:35:00 PM
Update time07/24/2023 10:19:18 AM
Status update07/24/2023 10:19:18 AM
Last indexation02/01/2024 8:03:50 AM
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