Meeting goals

Gamma-Cas is the first identified Be star and one of the first extra solar X-ray sources discovered. However, it became soon clear that its very hard and luminous X-ray emission was at strong variance with that observed from the bulk of Be stars. Galactic X-ray surveys, mainly those carried out by XMM-Newton, led to the discovery of a handful of Be stars with similar X-ray properties and sharing a narrow range of characteristics.

The origin of the outstanding X-ray emission of Gamma-Cas and its analogs is one of the most vexing issue in X-ray stellar astrophysics. Magnetic interaction between the early type star and the decretion disc compete with accretion scenarios to explain these outstanding features. Both explanations have deep astrophysical implications on massive star evolution.

The goal of the meeting is to inform the stellar community of the "Gamma-Cas" phenomenon and confront the different views put forward to explain this salient behaviour. 

Registration is open until June 15 2018


The meeting will take place in the historical building of the Strasbourg's Observatory (France), September 3-5 2018. 

Conference fee is 100 €. It includes lunches and conference dinner.

Attendance is limited to 50 persons.

Invited Speakers

  • Axel Brandenburg                            "Magnetic field generation in B stars"
  • Alex Carciofi                                   "Disk modelling and dynamics"
  • Kenji Hamaguchi                             "Accreting white dwarf models"
  • Raimundo Lopes de Oliveira             "X-ray observations of Gamma-Cas stars"
  • Ada Nebot                                       "New Gamma-Cas candidates and their populations"
  • Coralie Neiner                                 "Magnetic fields in B and Be stars"
  • Konstantin Postnov                          "Accretion models and the Gamma-Cas phenomenon"
  • Pablo Reig                                       "Be/X-ray binaries"
  • Thomas Rivinius                               "Gamma-Cas stars in the context of Be stars"
  • Henk Spruit                                      "Generation of MRI or other global instabilities in disks"
  • Philippe Stee                                   "Interferometric observations of stellar disks"
  • Dany Vanbeveren                             "Massive binary evolution"


 Scientific Organizing Commitee

Christian Motch (chair)
Yaël Nazé
Lida Oskinova
Myron Smith
Jose Miguel Torrejon

 Local Organizing Commitee

Ada Nebot
Christian Motch 

Important notes

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