The complex fossil magnetic field of the $\delta$ Scuti star HD\,41641

Abstract

Only three magnetic $\delta$ Scuti stars are known as of today. HD 41641 is a $\delta$ Scuti star showing chemical peculiarities and rotational modulation of its light-curve, making it a good magnetic candidate. We acquired spectropolarimetric observations of this star with Narval at TBL to search for the presence of a magnetic field and characterize it. We indeed clearly detect a magnetic field in HD 41641, making it the fourth known magnetic $\delta$ Scuti star. Our analysis shows that the field is of fossil origin, like magnetic OBA stars, but with a complex field structure rather than the much more usual dipolar structure.

9 pages, 6 figures, 5 tables plus 1 in appendix

References in corpus (3)

• Characterisation of the magnetic field of the Herbig Be star HD 200775
• The role of turbulent pressure as a coherent pulsational driving mechanism: the case of the delta Scuti star HD 187547
• Period spacings of gravity modes in rapidly rotating magnetic stars I. Axisymmetric fossil field with poloidal and toroidal components

Cited by in corpus (3)

• Statistical analysis of asteroseismic indices and stellar parameters of TESS-observed $\delta$ Scuti stars
• Magnetism in LAMOST CP stars observed by TESS
• Determining the incidence rate of magnetic $\delta$ Scuti candidates with CoRoT