Speaker
Alexander F. Kholtygin
(Astronomical Institute, Saint-Petersburg State University)
Description
The standard method of the magnetic field measurement, based on an analysis of
the relation between the Stokes V-parameter and the first derivative of the total
line profile intensity, has been modified by applying a linear integral operator L to
the both sides of this relation. The
wavelet transform with DOG-wavelets as the operator L is used. The advantage of the
method is an effective noise suppression for the line profile and the Stokes
parameter V. The efficiency of the method was
tested for model line profiles with various noise contributions. To test the proposed
method, we used the spectropolarimetric observations of the A0-type star alpha2 CVn
and the young O-type star
theta1 Ori C with well known magnetic field phase curves. The calculated by our
method longitudinal magnetic field strengths for these stars are in a good agreement
with those determined by other methods.
Primary author
Alexander F. Kholtygin
(Astronomical Institute, Saint-Petersburg State University)
