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Gradient of the stellar magnetic field in measurements of hydrogen line cores

Published online by Cambridge University Press:  01 November 2008

Dimitry O. Kudryavtsev  and
Iosif I. Romanyuk
Dimitry O. Kudryavtsev
Affiliation:
Special Astrophysical Observatory RAS, Nizhny Arkhyz, 369167, Russia
Iosif I. Romanyuk
Affiliation:
Special Astrophysical Observatory RAS, Nizhny Arkhyz, 369167, Russia
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Abstract

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We report the observed systematic differences in longitudinal magnetic field values, obtained from measurements of metal lines and the core of the Hβ line for a number of Ap stars, having strong global magnetic fields. In overwhelming majority of cases the magnetic field values, obtained from measurements of hydrogen lines cores, is smaller then the ones obtained from metal lines. We discuss some possible explanations of this effect, the most probable of which is the existence of the gradient of the magnetic field in stellar atmospheres.

Keywords

Stars: magnetic field – stars: chemically peculiar – stars: 53 Cam
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 411 - 412
Copyright
Copyright © International Astronomical Union 2009

References

Chountonov, G. A. 2004, in: Glagolevskij, Yu. V., Kudryavtsev, D. O., & Romanyuk, I. I. (eds.), Magnetic stars, Proc. International Conf. (Nizhny Arkhyz: SAO Press), p. 289Google Scholar