题目：Some surprises about the internal structure of A and F type main-sequence stars: importance for asteroseismology and observed abundances
报告人：Prof. Dr. Sylvie Vauclair
摘要：New computations of stellar modelling for A and F main sequence stars show that some important elements may accumulate with time in specific internal stellar layers. This leads to a local increase of the average opacity and to hydrodynamic instabilities that modify the internal stellar structure. I will show the consequences for A and F stars. I will also discuss the case of the star 94 Ceti, which has been observed for asteroseismology with the HARPS Spectrograph in Chili.