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Spectroscopic Diagnosis of Magnetic Fields of AP Stars

Published online by Cambridge University Press:  14 August 2015

G. Mathys
G. Mathys*
Affiliation:
European Southern ObservatoryCasilla 19001, Santiago 19, Chile

Extract

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Diagnosis of Ap star magnetic fields through spectroscopic methods is a broad topic, which cannot be fully covered within the rather tight limits of this contribution. Accordingly, the latter is devoted to only one particular approach, namely the determination of the mean magnetic field modulus from the observation of resolved magnetically split lines in high-dispersion spectra taken in unpolarized light. This determination is straightforward, mostly approximation free and model independent. The derived quantity, the mean magnetic field modulus, is the line-intensity weighted average over the visible stellar hemisphere of the modulus of the magnetic vector.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 676 - 678
Copyright
Copyright © Kluwer 1998

References

Babel, J., North, P., Queloz, D., 1995, A&A 303, L5 Google Scholar
Mathys, G., Hubrig, S., 1997 (in preparation)Google Scholar
Mathys, G., Hubrig, S., Landstreet, J.D., Lanz, T., Manfroid, J., 1997, A&AS 314, 491 Google Scholar