Gas and Galaxies: Tracers for Stage IV cosmological surveys

• Autores: Bernhard Vos Ginés
• Directores de la Tesis: Violeta González Pérez (dir. tes.), Santiago Javier Ávila Pérez (dir. tes.)
• Lectura: En la Universidad Autónoma de Madrid ( España ) en 2024
• Idioma: inglés
• Número de páginas: 170
• Títulos paralelos:
  • Gas y Galaxias: Trazadores de los surveys cosmológicos de cuarta generación
• Tribunal Calificador de la Tesis: David Alonso Monge (presid.), Weiguang Cui (secret.), Jacobo Asorey Barreiro (voc.)
• Programa de doctorado: Programa de Doctorado en Física Teórica por la Universidad Autónoma de Madrid
• Materias:
  • Astronomía y astrofísica
    • Cosmología y cosmogonía
• Enlaces
  • Tesis en acceso abierto en: Biblos-e Archivo
• Resumen

  • The focus of this thesis is to help analyse and interpret the results from spectroscopic galaxy surveys and neutral hydrogen ones. Both neutral hydrogen and galaxies trace the dark matter distribution. To maximise the extraction of cosmological information from these observables we need to take into account that each survey has its systematic errors that need to be taken into account to not bias our cosmological conclusions. We discuss if the Baryonic Acoustic Oscillations (BAO) signal could be recovered modelling an Square Kilometre Array (SKA) Neutral Hydrogen (HI) Intensity Mapping survey, taking into account the telescope beam and foreground removal observational effects. We expand the parameter space of Halo Occupation Distribution (HOD) models, allowing a continuous range of variances for the probability distribution function (PDF) applied to model satellite galaxies. We finally validate a method to extract information on non-local primordial non-Gaussianities (PNG), using HOD catalogues of model Luminous Red Galaxies (LRG).