Reference : UMR7164-KEVVEL-008
Nombre de Postes : 1
Workplace : PARIS 13
Date of publication : Wednesday, January 25, 2023
Scientific Responsible name : Josquin Errard
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 1 September 2023
Proportion of work : Full time
Remuneration : 2135.00 € gross monthly
Description of the thesis topic
The PhD fellow will join the APC SciPol team to develop a visible and active contribution to the cosmic microwave background data analysis within the international Simons Observatory collaboration.
The proposed thesis is in the field of CMB data analysis and proposes to contribute to the international effort to exploit the scientific potential of Simons Observatory data by developing new methods and techniques adapted to a statistical characterization of CMB polarization signals. These tools and methods will then be applied to the analysis of Simons Observatory data, with a view to exploiting them also in the framework of the future CMB-S4 and LiteBIRD projects.
The activities during the thesis will be the following:
- Development of numerical tools and algorithms for the analysis of cosmic microwave background data, validation and applications to simulated and real data in collaboration with the SciPol team at APC and the Simons Observatory collaboration.
- Regular progress reports during weekly group meetings.
- Participation in weekly teleconferences and collaboration meetings.
- Preparation for the dissemination of numerical tools (internal and/or public)
- Preparation of documentation for numerical tools.
- Presentation of the results during workshops and conferences.
The Simons Observatory is an array of CMB telescopes installed at an altitude of 5,200m in the Atacama desert which will achieve its first light in 2024. The "Small Aperture Telescopes" aim to constrain inflationary signals with high instrumental sensitivity — their data will be at the heart of the doctoral work.
The european SciPol project (PI : J. Errard) started in January 2023 and will last for 5 years. It supports the development of new data analysis techniques aimed at robustly and accurately characterizing CMB polarization at large angular scales, and in particular the primordial B-modes generated by hypothetical inflationary gravitational waves. The project thus proposes a modeling, a precise characterization and subtraction of the instrumental effects, as well as the astrophysical and environmental contaminations. This involves the analysis of large volumes of data and the development of robust and numerically efficient algorithms.
The PhD student will interact with the members of the SciPol team (1 permanent, 4 PhD students, 1 engineer, 5 external collaborators) and SO of the APC, as well as with the members of the cosmology group.
Constraints and risks
Missions in France and abroad are possible, within the framework of exchanges with our collaborators on the project, but also to participate in conferences.
References : simonsobservatory.org ; scipol.in2p3.fr
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