We present the results of a magnetic survey of a sample of eight beta Cepheistars and 26 Slowly Pulsating B stars with FORS1 at the VLT. A weak meanlongitudinal magnetic field of the order of a few hundred Gauss is detected inthe beta Cephei star xi^1 CMa and in 13 SPB stars. The star xi^1 CMa becomesthe third magnetic star among the beta Cephei stars. Before our study, the starzeta Cas was the only known magnetic SPB star. All magnetic SPB stars for whichwe gathered several magnetic field measurements show a field that varies intime. We do not find a relation between the evolution of the magnetic fieldwith stellar age in our small sample. Our observations imply that beta Cepheistars and SPBs can no longer be considered as classes of non-magneticpulsators, but the effect of the fields on the oscillation properties remainsto be studied.
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机译：我们在VLT上对FORS1的8个β造父变星和26个缓慢脉动的B星样本进行了磁调查的结果。在βCephei星xi ^ 1 CMa和13个SPB星中检测到了几百个高斯的弱平均纵向磁场。 xi ^ 1 CMa恒星成为β塞菲星中的第三颗磁性星。在我们的研究之前，starzeta Cas是唯一已知的磁性SPB恒星。我们收集了几次磁场测量结果的所有SPB磁性恒星均显示出随时间变化的场。在我们的小样本中，我们没有发现磁场演化与恒星年龄之间的关系。我们的观察结果表明，β造父变星和SPB不再被视为非电磁脉冲类，但磁场对振荡特性的影响仍有待研究。
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