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Zeeman split lines in CP stars: a discovery of low-contrast fields in slow rotators?
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Astronomy and Space Physics.
2008 (English)In: Contributions of the Astronomical Observatory Skalnate Pleso, ISSN 1335-1842, Vol. 38, no 2, 421-422 p.Article in journal (Refereed) Published
Abstract [en]

We show that high-resolution observations of resolved Zeeman split lines can be used to obtain new constraints on the stellar magnetic field geometry. In particular, the contrast of the field strength distribution over the stellar surface can be deduced from differential measurement of the second moment of the pi and sigma Zeeman components. Our analysis of the triplet lines in slowly rotating cool magnetic CP stars uncovers a surprisingly homogeneous field structure, inconsistent with any low-order multipolar geometry.

Place, publisher, year, edition, pages
2008. Vol. 38, no 2, 421-422 p.
Keyword [en]
stars : atmospheres, stars : chemically peculiar, stars : magnetic fields, stars : individual : HD 47103, HD 154708
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-149678ISI: 000256514000057OAI: oai:DiVA.org:uu-149678DiVA: diva2:405815
Note
Conference Information: CP/AP Workshop 2007 Vienna, AUSTRIA, SEP 10-14, 2007Available from: 2011-03-23 Created: 2011-03-22 Last updated: 2011-03-23Bibliographically approved

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