Cosmologie

Doctorat sur le développement et modélisation de la chaîne de détection pour les observations du fond diffus cosmologique de la prochaine génération d'instrument (H/F)

Type de contrat : CDD Doctorant/Contrat doctoral
Durée du contrat : 36 mois
Date de début de la thèse : 1 octobre 2024
Quotité de travail : Temps complet Description du sujet de thèse

One of the small-aperture telescopes at the Simons Observatory. Brian Keating/UC San Diego
 
Les premiers télescopes du Simons Observatory, au Chili, ont entamé leur prise de données et marquent ainsi le démarrage scientifique de ce projet qui doit s’étaler sur 10 ans et qui vise à effectuer la mesure la plus précise jamais effectuée du fond diffus cosmologique.
 

International SciPol internship

We are proposing an undergrad internship in lines of the SciPol (scipol.in2p3.fr) European project, focused on CMB data analysis for the discovery of primordial polarized CMB B-modes. 

The intern will focus on the modeling of specific parts of the detection chain (astrophysical foregrounds, atmosphere, instrument, ground pickup, etc.) and will propose a mitigation technique associated to this specific effect. 

Probing Dark Energy with Euclid Cluster Observations

The European Space Agency’s (ESA) Euclid space mission aims to reveal the nature of dark energy, the mysterious cause of the observed accelerated expansion of the universe. Identifying dark energy is arguably the most profound question facing fundamental Physics today, because of its connection between the quantum world and gravity. Euclid will measure the dark energy equation-of-state (EoS), which is to say that it will determine if dark energy is constant or varies with time, a key distinction for theoretical understanding.

SciPol internship (M1)

We are proposing a M1 internship to work on the component separation of the LiteBIRD space mission. It will involve the handling of python codes, CMB and astrophysical signals simulations, as well as the learning of the basics of CMB data analysis. 

This internship would be part of the global effort undertaken by the SciPol project: https://scipol.in2p3.fr/

Exploration and visualisation of fluctuations of cosmic microwave background anisotropies

The objective of the internship is to familiarize the student with modern cosmology and particularly with the physics, informational content, as well as practical applications and observations of the fluctuations of the cosmic microwave background (CMB). The student will explore different observational techniques and approaches used for observations of the CMB and critically compare them. The student will learn to use and compare multiple numerical codes developed by the community in order to generate simulated maps of the CMB sky and explore the impact of beam effects on them.

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