Missions

The cosmology group at the Centre de Physique des Particules de Marseille (CPPM) is looking to recruit a researcher to join the team led by Alice Pisani, to work in the field of cosmology and large-scale structures of the Universe. The research activity will focus on cosmological constraints with cosmic voids based on data from major modern surveys (the Euclid satellite, the Dark Energy Spectroscopic Instrument, the Vera Rubin survey). In particular, the position will be dedicated to providing pillars of expertise for spectroscopic and photometric surveys. The person recruited will be involved in DESI, Euclid and Rubin analyses. This will provide support for the preparation and implementation of analyses. Alice's team includes several post-docs and PhD students, and collaborates with the dynamic community of PhD students, post-docs, engineers and researchers working at CPPM. The position will be funded by the ERC COSMOBEST project, for which Alice Pisani is responsible.

Activities

The work will aim to optimize the production and analysis of void catalogs from spectroscopic and photometric data from modern boreholes, providing pillars of expertise for both types of borehole. In particular, the activity will provide measurements of void statistics that take account of spectroscopic and photometric errors (depending on the survey under consideration), with an estimate of the error budget for constraints arising from these statistics. The researcher will provide expert implementation for spectroscopic and photometric analyses with voids, working on data preparation with simulation analysis, void statistics measurements, bias measurements and studies for constraint combinations.

Skills

A PhD in cosmology or astrophysics is required, as well as a minimum of 3 years' professional experience. Expertise with void finders is desirable (2D/3D algorithms), as well as expertise in large-scale collaborations. The work will focus on the extraction of cosmological constraints from simulations and data.

Work Context

Located in the heart of the Parc National des Calanques, on the Luminy campus, the CPPM is a joint research laboratory of the CNRS and Aix-Marseille University, with around 180 researchers, engineers and PhD students. The laboratory studies subjects ranging from particle physics to astroparticle physics and cosmology, with a strong technological focus on electronics, mechanics, instrumentation and computing, enabling the design and construction of cutting-edge detection systems, often called upon to operate under extreme conditions: in the depths of the sea, in space or underground. Most of our research is carried out as part of leading international scientific collaborations, and our contributions are recognized worldwide. CPPM is committed to ethical research and promotes diversity and inclusion in the workplace, and provides administrative and logistical support to newcomers, particularly PhD students. (more details here: https://www.cppm.in2p3.fr/web/fr/index.html)