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The pecular magnetic field morphology of the white dwarf WD 1953-011: evidence for a large-scale magnetic flux tube?
 

Summary: The pecular magnetic field morphology of the white dwarf
WD 1953-011: evidence for a large-scale magnetic flux tube?
G. Valyavin1
, G.A. Wade2
, S. Bagnulo3
, T. Szeifert4
, J.D. Landstreet5
, Inwoo Han1
,
A. Burenkov6
ABSTRACT
We present and interpret new spectropolarimetric observations of the mag-
netic white dwarf WD 1953-011. Circular polarization and intensity spectra of
the H spectral line demonstrate the presence of two-component magnetic field in
the photosphere of this star. The geometry consists of a weak, large scale compo-
nent, and a strong, localized component. Analyzing the rotationally modulated
low-field component, we establish a rotation period Prot = 1.4480 0.0001 days.
Modeling the measured magnetic observables, we find that the low-field compo-
nent can be described by the superposition of a dipole and quadrupole. According
to the best-fit model, the inclination of the stellar rotation axis with respect to

  

Source: Armagh Observatory

 

Collections: Physics