The EES2026 Stellar Physics School follows the tradition of the prestigious Evry Schatzman Schools (EES), which have been organized annually since 1989 by the French Program: Action Thématique de Physique Stellaire (ATPS). The school typically brings together between 35 and 50 participants, including both early-career researchers and more senior scientists.

The 2026 edition will focus on stellar magnetism. Since the early twentieth century and the discovery of the magnetic origin of sunspots, astrophysicists have been fascinated by magnetic fields. Their influence may significantly modify many stellar properties, such as stellar radius or luminosity. These parameters are fundamental to most areas of astrophysics. A better understanding of stellar magnetism could therefore profoundly reshape our view of the Universe.

Despite significant recent progress made possible by new observational facilities and the emergence of powerful computational resources, much remains to be done to fully understand the origin and effects of magnetic fields in stars. This problem can be addressed using a variety of methodological approaches, which will be presented and developed during this school. Our approach is also naturally interdisciplinary, as many physical processes related to magnetism are common to both planetary and stellar interiors, which can also be studied through laboratory experiments.

The goal of this school is to provide PhD students, postdoctoral researchers, and scientists with the essential foundations needed to begin or further develop expertise in technical aspects of stellar magnetism. Participants will attend several in-depth lectures covering the theoretical constraints governing magnetized flows in stellar physics, as well as the observational and numerical tools commonly used at both national and international levels to conduct cutting-edge research. Hands-on practical sessions with experts of these tools will be organized in small groups. Particular emphasis will also be placed on the synergies between stellar physics and planetary science.

PhD students, postdocs or permanent researchers interested in stellar magnetism can apply to participate at this schoool.

Dynamo theory : Florence Marcotte, INRIA, Nice.

Spectropolarimetric observations : Julien Morin, LUPM, Montpellier.

MHD instabilities : Laurène Jouve, IRAP, Toulouse.

Asteroseismology and magnetic fields : Jordan Philidet, LIRA, Paris.

Impact of magnetic fields on stellar evolution : Morgan Deal, LUPM, Montpellier.

Thanks to the support of the CNRS Formation program, the ATPS, the AIPS (program of the Scientific Council of Observatoire de Paris), the Centre Jules Janssen of Observatoire de Paris, PLATO, CEA, and the GdR MFGA, the school will cover the participants’ accommodation and meal expenses.

Travel expenses will not be covered by the school. For CNRS staff members, these costs may be funded through the Formation program of their regional CNRS delegation. Other participants are invited to seek support from their home laboratories. In particular, PhD students are strongly encouraged to apply to their doctoral schools for travel funding.

The organising committee is composed by Ludovic Petitdemange (LIRA), Clément Baruteau (IRAP), Kévin Belkacem (LIRA), Ana Palacios (LUPM), Antoine Strugarek (AIM), Evelyne Alecian (IPAG).