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A theorist's view of the A-star laboratory

Published online by Cambridge University Press:  02 March 2005

Hiromoto Shibahashi
Hiromoto Shibahashi
Affiliation:
Department of Astronomy, University of Tokyo, Tokyo 113-0033, Japan email: shibahashi@astron.s.u-tokyo.ac.jp
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Abstract

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Two topics concerning A-type stars are discussed: starspots associated with the strong magnetic fields and the prospects for asteroseismology. Considering starspots as analogous to sunspots is misleading. The photosphere of starspots of a magnetic A-star is higher than the normal photosphere, contrary to sunspots. As for the prospects of asteroseismology, it is demonstrated how well (or poorly) we can probe the internal structure of the distant stars using a limited number of p-mode frequencies. Although the detectable eigenmodes must be limited to be $\ell \leq 4$, if the observational error is of the order of $10^{-3}$, inversion has still some hope.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Stars: chemically peculiarstars: interiorsstars: oscillationsstars: spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS224 , July 2004 , pp. 451 - 457
Copyright
© 2004 International Astronomical Union