The challenge of measuring magnetic fields in strongly pulsating stars: the case of HD 96446

Abstract

Among the early B-type stars, He-rich Bp stars exhibit the strongest large-scale organized magnetic fields with a predominant dipole contribution. The presence of $\beta$ Cep-like pulsations in the typical magnetic early Bp-type star HD 96446 was announced a few years ago, but the analysis of the magnetic field geometry was hampered by the absence of a reliable rotation period and a sophisticated procedure for accounting for the impact of pulsations on the magnetic field measurements. Using new spectropolarimetric observations and a recently determined rotation period based on an extensive spectroscopic time series, we investigate the magnetic field model parameters of this star under more detailed considerations of the pulsation behaviour of the line profiles.

References in corpus (3)

• HARPS spectropolarimetry of Herbig Ae/Be stars
• The strong magnetic field of the large-amplitude beta Cephei pulsator V1449 Aql
• Two new chemically peculiar stars with resolved magnetically split lines

Cited by in corpus (5)

• The Magnetic Early B-type Stars I: Magnetometry and Rotation
• Detection of magnetic fields in chemically peculiar stars observed with the K2 space mission
• A magnetic study of the $\delta$ Scuti variable HD 21190 and the close solar-type background star CPD -83${}^{\circ }$ 64B
• The magnetic variability of the $\beta$~Cep star ${\xi }^1$\,CMa
• Magneto-asteroseismology of massive magnetic pulsators