Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980iraj...14..216s&link_type=abstract
(Astronomical Science Group of Ireland, Meeting, Armagh, Northern Ireland, June 25, 1980.) Irish Astronomical Journal, vol. 14,
Astronomy and Astrophysics
Astronomy
2
A Stars, Magnetic Stars, Peculiar Stars, Stellar Magnetic Fields, Stellar Models, Magnetic Field Configurations
Scientific paper
Several models have been proposed to explain the magnetic variations on different time scales of magnetic Ap stars, the apparent absence of constant field strengths and the correlation among light, spectrum, radial velocity and magnetic variations. The Stibbs oblique rotator model, which places a magnetic dipole at the center of a rotating star, has been quite successful with the Landstreet decentered dipole model accounting for some contradictions between observations and the Stibbs model. Photoelectric measurements and polarimetry resolved some discrepancies between observation and theory in Landstreet's model. A non-axisymmetric rigid rotator model consisting of a dipole placed at an arbitrary position inside stars and forming an arbitrary angle with the rotational axis constitutes the most general dipole configuration. The scatter parameter is stated and a Chebyshev approach used to make it behave well.
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