STAGE Cosmology in the era of the South Pole Telescope

Date de mise à jour de l’offre

CNRS - Institut d'Astrophysique de Paris :

Unité Mixte de Recherche CNRS & Sorbonne Université

Description de la mission

One of the main driving forces behind the extraordinary progress in cosmology in the last 20 years has been the observation of the cosmic microwave background (CMB). Europe has played a leading role in this field in the last years through the success of ESA’s Planck satellite, which provided the ultimate measurement of the CMB temperature anisotropies, at the resolution allowed by the experiment, and powerful measurements of the CMB polarization anisotropies as well.
However, the information content of the weakly polarized CMB signal is still largely to be uncovered, with the Planck measurements still far from being cosmic variance limited. While Planck is in very good agreement with the predictions of the LCDM standard model of cosmology and with the results of many other probes, it features a number of interesting problems which might hint to cracks in the standard model of cosmology . Examples of these are the value of the Hubble constant in agreement with other high-redshift measurements but higher than distance-ladder SupernovaeIA measurements and other low-redshift measurements; a mild discrepancy with weak gravitational lensing experiments and counts of galaxy clusters on the amplitude of density perturbations today, s8; and an amplitude of the peak smoothing of the temperature power spectrum which is higher than what expected in the LCDM model.
This Master 2 internship proposes to tackle these issue by contributing to the co-analysis of the Planck and SPT data.
The South Pole Telescope (SPT) is one of the most advanced experiments currently observing the CMB sky, with its SPT-3G version being the first to observe it with around 15000 detectors.
The interneship will take place within the framework of a new collaboration between the Planck (IAP-Paris) and SPT (KICP-Chicago) teams. The ultimate goal is to co-analyse the Planck and SPT data to ensure the consistency of the measurements, understand mutual systematics that might be lingering in either of the two datasets and constrain cosmological parameters.
It will be possible to continue this project in a PhD thesis starting in September 2020.

Profil recherché

Nature du travail demandé : Traitement de données
Pré-requis : Some knowledge of cosmology. Some knowledge of Python

Niveau de qualification requis

Bac + 4/5 et +
  • Employeur
    CNRS - Institut d'Astrophysique de Paris
  • Secteur d’activité de la structure
    Enseignement - Formation - Recherche
  • Effectif de la structure
    De 51 à 250 salariés
  • Site internet de la structure
    http://www.iap.fr
  • Type de stage ou contrat
    Stage pour lycéens et étudiants en formation initiale
  • Date prévisionnelle de démarrage
  • Durée du stage ou contrat
    Plus de 2 mois et jusqu'à 4 mois
  • Le stage est-il rémunéré ?
    Oui
  • Niveau de qualification requis

    Bac + 4/5 et +
  • Lieu du stage
    98 bis Boulevard Arago
    75014 PARIS 14E ARRONDISSEMENT
  • Accès et transports
    Métro / RER Denfert-Rochereau