Abstract

In the present paper, we study HD 144941, a EHe-r magnetic star with a very strong magnetic field and unique abundance of helium. We determined the magnetic field variability period equal to 6.969 days and proposed the most probable model of the magnetic field structure. The average surface magnetic field \(B_{s}=11\,226\) G, the magnetic field structure can be described by the theoretical magnetic dipole model located in the center of the star. The inclination angle of the dipole axis to the rotation equator plane is unusually great: \(\alpha=65^{\circ}\). The star’s age after the ZAMS is about \(10^{6}\) yr. We suppose that in terms of a very strong magnetic field, the wind ‘‘blows out’’ significant amount of helium to the surface according to the diffusion theory.

中文翻译：

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He-r星HD 144941的磁场结构

摘要

在本文中，我们研究了 HD 144941，这是一颗 EHe-r 磁星，具有非常强的磁场和独特的氦丰度。我们确定磁场变化周期等于6.969天，并提出了磁场结构的最可能模型。平均表面磁场\(B_{s}=11\,226\) G，磁场结构可以用位于恒星中​​心的理论磁偶极子模型来描述。偶极轴与旋转赤道面的倾角异常大：\(\alpha=65^{\circ}\)。ZAMS后恒星的年龄约为\(10^{6}\)年。根据扩散理论，我们假设在非常强的磁场下，风将大量的氦“吹出”到表面。