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报告:Some surprises about the internal structure of A and F type main- sequence st

更新时间:2017-03-03 09:17:02点击次数:527次字号:T|T
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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

法国图卢兹第三大学教授、法国天文学会前主席

时间:2017313日星期一  下午4:00―5:30

地点:物理楼402

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.