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2014MNRAS.440..182S - Mon. Not. R. Astron. Soc., 440, 182-192 (2014/May-1)
Stokes IQUV magnetic Doppler imaging of Ap stars - II. Next generation magnetic Doppler imaging of α2 CVn.
SILVESTER J., KOCHUKHOV O. and WADE G.A.
Abstract (from CDS):
We then derive an updated magnetic structure map for α2 CVn based on the complete sample of Fe and Cr lines, which we believe to produce a more representative model of the magnetic topology of α2 CVn. In agreement with the previous mapping, this new updated magnetic map shows a dipolar-like field which has complex sub-structure which cannot be explained by a simple low-order multipolar geometry. Our new maps show that regardless of the atomic line or species choice, the reconstructed magnetic field is consistent with that published previously, suggesting that the reconstructed field is a realistic representation of the magnetic field of α2 CVn. α2 CVn is the first Ap star for which multiple, high-resolution magnetic maps have been derived, providing important observational evidence for the stability of both the large- and small-scale magnetic field.
Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)
Journal keyword(s): stars: chemically peculiar - stars: magnetic field
Simbad objects: 2
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