Magneto-asteroseismic study of ι Lib
Résumé
About 10 % of early-type stars host a large-scale magnetic field, which is expected to affect their physical conditions. However, only a limited amount of observations exist to corroborate the extent of the effects of the large-scale magnetic field. Therefore, we searched for magnetic pulsating early-type stars, as the stellar pulsations provide an exclusive observational window to the internal stellar properties. In this work, we have analysed the ESPaDOnS and Narval spectropolarimetry to characterize the large-scale magnetic field of ι Lib and derive the star's rotation period. In addition, we investigated the K2 light curve of ι Lib with the aim to detect possible pulsation mode frequencies. Two of the low-amplitude frequencies fall in the frequency domain of g modes. However, more observations are needed to confirm these to be actual g modes and whether they originate from the magnetic early-type star in the ι Lib binary system.