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| Post-doctoral position in theoretical HE multi-messenger astrophysics | Closing date: 2026-03-01
Contact: Martin Lemoine |
| We are pleased to invite applications for a post-doctoral fellowship at APC (Astroparticule & Cosmologie, CNRS - Université Paris-Cité), starting in the Fall of 2026 (2+1 years). The post-doctoral fellow will conduct high-performance GR-MHD numerical simulations of accreting supermassive black holes to investigate particle acceleration in these extreme environments and extract multi-messenger signatures. | | ▸ more | We are pleased to invite applications for a post-doctoral fellowship in theoretical high-energy multimessenger astrophysics at APC (Astroparticule & Cosmologie, CNRS - Université Paris-Cité). The preferred start date for this position is Fall 2026, with an initial appointment of two years and the possibility of renewal for up to three years. This fellowship is part of the ANR-funded HENBoS (High-Energy Neutrinos from Black Hole Systems) project, which seeks to characterise with unprecedented accuracy massive black hole systems as cosmic accelerators and sources of very high-energy photons, cosmic rays and neutrinos.
Interested applicants are invited to submit a CV (including a publication list and research achievements) and a research statement highlighting how the project aligns with the candidate's career goals via the platform:
https://emploi.cnrs.fr/Offres/CDD/UMR7164-KEVVEL-049/Default.aspx?lang=EN
Applications will be reviewed on a rolling basis until the position is filled.
The post-doctoral fellow will conduct high-performance GR-MHD numerical simulations of accreting supermassive black holes using the latest version of the GRAMRVAC code, developed in-house. The primary focus of these simulations will be on identifying and investigating the particle acceleration processes in these extreme environments. To this effect, the post-doctoral fellow will contribute to the development and application of the hybrid simulation code mPIC-GRAVAC in general relativity. This code integrates a magnetohydrodynamic (MHD) description of the thermal plasma with a Particle-In-Cell (PIC) modelling of supra-thermal particles, enabling cutting-edge simulations of the immediate vicinity of supermassive black holes. These simulations constitute the core task of the HENBoS project and will be complemented by theoretical studies to establish definitive predictions for multimessenger emission.
We are seeking highly motivated individuals with robust expertise in computational plasma astrophysics (MHD, GRMHD or PIC) and post-PhD research experience. The ability to work effectively in a collaborative team environment is essential.
The HENBoS project, led by Martin Lemoine, brings together a team of experts in multimessenger theory, GR-MHD simulations, and VHE multimessenger data analysis. The post-doctoral fellow will collaborate closely with Fabien Casse and Peggy Varnière, developers of the mPIC-GRAVAC code, and will have the opportunity to engage with other project collaborators. APC is a vibrant research unit of CNRS and Université Paris-Cité, actively involved in major experimental and theoretical projects in cosmology, multi-messenger astrophysics, and particle physics. The post-doctoral fellow will have access to excellent computing facilities, including a local cluster and national supercomputing centres.
The salary is determined by the administrative rules of French civil service. It ranges from 37k euros to 42k euros per year (gross, pre-tax), depending on the applicant's experience. Benefits include health insurance, 44 days of annual leave, subsidies for meals and public transportation, and the option for remote work (up to two days per week). A specific travel allowance is also provided. CNRS is committed to fostering diversity and inclusion in the workplace.
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