First magnetic field models for recently discovered magnetic beta Cephei and slowly pulsating B stars

TL;DR

This paper presents the first magnetic field models for recently discovered magnetic beta Cephei and SPB stars, based on new measurements that help understand their rotation, magnetic geometry, and impact on stellar properties.

Contribution

It introduces the first magnetic field models for these stars, utilizing new observational data to analyze their magnetic geometry and rotation periods.

Findings

New longitudinal magnetic field measurements obtained with VLT.

Constraints on magnetic field geometry for four stars.

Identification of rotation periods for some stars.

Abstract

In spite of recent detections of magnetic fields in a number of beta Cephei and slowly pulsating B (SPB) stars, their impact on stellar rotation, pulsations, and element diffusion is not sufficiently studied yet. The reason for this is the lack of knowledge of rotation periods, the magnetic field strength distribution and temporal variability, and the field geometry. New longitudinal field measurements of four beta Cephei and candidate beta Cephei stars, and two SPB stars were acquired with FORS2 at the VLT. These measurements allowed us to carry out a search for rotation periods and to constrain the magnetic field geometry for four stars in our sample.