Abstract pending…
Something around: Towards multi-messenger observations of accreting supermassive binary black holes
GECO
LAM seminar: Max Franco
Abstract pending…
LAM seminar: Salvatore Capozziello
Abstract: pending…
Something about theory and modified gravity with respect to lensing
Cancelled LAM seminar: Elena Sellentin
Seminar is cancelled for personal reasons
LAM seminar: Pierre Alain Duc
Abstract pending…
Topics:
Low surface brightness features in galaxies
Grand Public seminar: Christophe Adami
This seminar will give an overview of the current and future state of the Observatoire de Haute Provence.
Yaël Nazé – The mysterious gamma Cas stars
Long thought to be a prototype of Be stars, the first detected case of such objects, gamma Cas, was found to be actually atypical amongst them!
Indeed, it emits very bright and extremely hard X-rays with a luminosity intermediate between that of normal massive stars and that of high-mass X-ray binaries. Recent efforts in X-ray monitorings have revealed that such objects are not uncommon hence gamma Cas stars are important ionizing sources, particularly at low metallicities where Be stars abound. The properties of these stars will be reviewed using the latest observational results.
