Diffusion and Settling in Ap/Bp Stars.

Turcotte, S.

Technical Information Center Oak Ridge Tennessee

关键词: Diffusion;    Settling;    Stars;    Abundance;    Levitation;   

RP-ID  :  DE200415007358

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Ap/Bp stars are magnetic chemically peculiar early A and late B type stars of the main sequence. They exhibit peculiar surface abundance anomalies that are thought to be the result of gravitational settling and radiative levitation. The physics of diffusion in these stars are reviewed briefly and some model predictions are discussed. While models reproduce some observations reasonably well, more work is needed before the behavior of diffusing elements in a complex magnetic field is fully understood.