Open AccessThe magnetic field and the evolution of element spots on the surface of the HgMn eclipsing binary AR Aur ★
Author(s) -
Hubrig S.,
Savanov I.,
Ilyin I.,
González J. F.,
Korhonen H.,
Lehmann H.,
Schöller M.,
Granzer T.,
Weber M.,
Strassmeier K. G.,
Hartmann M.,
Tkachenko A.
Publication year - 2010
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2010.00928.x
Subject(s) - astrophysics , gauss , binary number , magnetic field , field (mathematics) , physics , spots , chemistry , mathematics , arithmetic , quantum mechanics , pure mathematics
The system AR Aur is a young late B‐type double‐lined eclipsing binary with a primary star of HgMn peculiarity. We applied the Doppler imaging method to reconstruct the distribution of Fe and Y over the surface of the primary using spectroscopic time series obtained in 2005 and from 2008 October to 2009 February. The results show a remarkable evolution of the element distribution and overabundances. Measurements of the magnetic field with the moment technique using several elements reveal the presence of a longitudinal magnetic field of the order of a few hundred gauss in both stellar components and a quadratic field of the order of 8 kG on the surface of the primary star.