PhD student (M/F): Constraining the physical properties of young galaxies using CIGALE2D modeling of multi-wavelength photometric and spectroscopic data

Job Description

Thesis Subject

This thesis is funded by the ANR CIGALE2D project, which aims to develop and utilize an extension of the CIGALE software for spatially resolved observations of distant galaxies. The CIGALE software is a global standard for determining the physical parameters of galaxies (stellar mass, star formation rate, dust extinction, etc.) based on the galaxy integrated photometry. Recently, a spectroscopic module has also been developed. The goal of the CIGALE2D project is to extend this tool to the resolved analyses made possible by the JWST and ALMA telescopes. The Strasbourg Observatory is responsible for the spectroscopic component of CIGALE2D. In a first phase, the successful candidate will test the combination of the CIGALE spectroscopic module with the 2D modules. They will then apply this new tool to the ALPINE CRISTAL sample to study the assembly of massive galaxies at z~5 using a very rich dataset combining high-resolution JWST and ALMA data in both photometry and spectroscopy. In a second phase, the candidate will develop an approach combining resolved photometry and slit spectroscopy. This approach will then be directly applied to the JWST CAPERS spectroscopic surveys to study the rejuvenation of disks at z~2.

Your Work Environment

The successful candidate will be based at the Strasbourg Astronomical Observatory, within the Galaxies, High Energies, and Cosmology team (OBAS/GALHECOS), and will work under the supervision of Matthieu Béthermin. They will be affiliated with Doctoral School 182 (Physics and Physical Chemistry). The Strasbourg Astronomical Observatory is a joint research unit (UMR) of the CNRS and the University of Strasbourg, located in the heart of the city's historic campus. It comprises approximately 100 staff members, including about 30 permanent scientists whose primary research areas are galactic physics, high-energy astrophysics, and data science for astronomy. The successful candidate will also work closely with the CIGALE2D project team at CEA Saclay, the Marseille Astrophysics Laboratory, and the Côte d'Azur Observatory. Finally, there will be regular exchanges with members of major international collaborations, including ALPINE CRISTAL and CAPERS, as well as travel to conferences in France and abroad. The successful candidate will be eligible for French social benefits (health insurance, paid leave), partial reimbursement of transportation costs, and access to a subsidized canteen.

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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