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The Magnetic Field Geometry and Abundance Distributions of Iron-Peak Elements in the Ap Star 53 Camelopardalis

Published online by Cambridge University Press:  19 July 2016

J. D. Landstreet
J. D. Landstreet*
Affiliation:
Department of Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada

Abstract

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Spectra and magnetic measurements of the strongly magnetic Ap spectrum variable 53 Cam have been modelled using a line synthesis programme that calculates LTE line profiles, including magnetic and polarization effects and non-uniform distribution of elements over the star. The magnetic field is found to be reasonably well modelled with colinear dipole, quadrupole and octupole components of strengths (at the strong negative magnetic pole) of −16.3, −7.3, and +4.9 kG respectively. Chromium and iron are almost uniformly distributed with abundances of about 102 and 10 times solar. Ti and Ca, in contrast, are quite non-uniformly distributed; Ti is more than 10 times overabundant near the negative pole and probably underabundant elsewhere, while Ca is overabundant around the positive pole and slightly underabundant elsewhere.

Type
V. Magnetic Pieuds
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 321 - 324
Copyright
Copyright © Kluwer 1988 

References

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