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| PhD Research Position in Stellar and Binary Population Modeling at the University of Geneva | Closing date: 2026-04-30
Contact: Prof. Tassos Fragos |
Applications are invited for a PhD position in theoretical and computational astrophysics at the Department of Astronomy of the University of Geneva. The successful candidate will join the group of Prof. Tassos Fragos and contribute to the development and calibration of next-generation panchromatic spectral synthesis models of stellar populations that include the effects of binary evolution, using the POSYDON binary population synthesis framework.
| | ▸ more | The project combines two complementary research directions. The first is the development of new spectral modeling capabilities for stellar and X-ray binary populations, nebular emission, and diffuse feedback from stellar winds and supernovae. The second is the calibration of these models against observational constraints from populations of stripped stars, Wolf-Rayet stars, supergiants, and supernovae, with the goal of constraining uncertain aspects of stellar and binary evolution. The exact balance of tasks will depend in part on the background and strengths of the selected candidate, as well as on the overall composition of the research team. The PhD candidate will work closely with other members of the group and with collaborators in the POSYDON collaboration.
The Department of Astronomy of the University of Geneva offers an active and stimulating research environment in astrophysics, with strengths spanning stellar astrophysics, compact objects, exoplanets, galaxy evolution, and computational methods.
Applicants should hold, or be close to completing, a Master's degree in astronomy, astrophysics, or physics, by the start of the appointment. We seek candidates with a strong background in astrophysics and interest in one or more of the following areas: stellar evolution, binary stars, compact objects, stellar populations, supernovae, or computational astrophysics. Solid programming skills, in particular in Python, are expected. Prior experience with stellar evolution, population synthesis, or statistical analysis is also welcome.
The duration of the PhD program is 4 years. The initial appointment will be for one year and renewed subject to satisfactory progress, according to University of Geneva regulations. The expected starting date is 01/09/2026, although some flexibility is possible.
Applications should include a cover letter, a curriculum vitae, a brief statement of research interests and previous experience, transcripts, and the names and email addresses of at least two references. Applications should be submitted by email to Prof. Tassos Fragos (anastasios.fragkos @ unige.ch), with the subject line "PhD Position Geneva - [Applicant Name]". All application materials must be combined into a single PDF file. Letters of recommendation will be requested only for shortlisted candidates.
Review of applications will begin immediately and will continue until the position is filled. Informal inquiries may be addressed to Prof. Tassos Fragos at anastasios.fragkos @ unige.ch.
**Compensation and Benefits**
Compensation Range: CHF 54,685 to 63,071 gross annual salary, in accordance with SNSF salary regulations and University of Geneva scales.
Included Benefits: Standard Swiss social security, accident insurance, competitive pension contributions, and other employment benefits in accordance with University of Geneva policies. Doctoral students employed at the University of Geneva also benefit from 30 working days of annual leave, in addition to official public holidays and the year-end university closure.
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