The magnetic fields of the AP stars.
The magnetic fields of the AP stars.
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AP 恒星的磁场。
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
J. Landstreet
中科院分区：
文献类型：
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作者：
E. Borra;J. Landstreet
我们对明亮的北、南Ap星之间的纵向磁场（B/sub e/）进行了观测。所使用的光电技术包括H翼的圆形塞曼偏振法…我们发现光电B/sub e/曲线比照相B/sub e/曲线更趋于谐波。我们在几颗快速旋转的Ap星上发现了磁场。有边际统计证据表明，快速旋转体的表面磁场可能比慢速旋转体小；然而，一些非常快速的旋转（P=0.5天）可以明显地有B/sub - e/极值(大约。1千高斯)与慢速旋转器的极值相当。尽管我们不能排除某些恒星中200高斯数量级的不规则变化，但我们没有发现不规则B/sub e/变化的重要证据。简要讨论了我们发现的天体物理学意义。我们观察了几颗Am和Hg-Mn恒星，没有发现磁场的证据。
We have conducted a survey of longitudinal magnetic fields (B/sub e/) among bright northern and southern Ap stars. The photoelectric technique used involves circular Zeeman polarimetry in the wings of H..beta... We find that the photoelectric B/sub e/ curves tend to be more harmonic than the photographic B/sub e/ curves. We have discovered magnetic fields in several rapidly rotating Ap stars. There is marginal statistical evidence to suggest that the rapid rotators might have surface magnetic fields smaller than the slow rotators; however, some very rapid rotators (P=0.5 days) can clearly have B/sub e/ extrema (approx.1 kilogauss) comparable to the extrema of slow rotators. We do not find serious evidence for irregular B/sub e/ variations, although we cannot exclude irregular variations of the order of 200 gauss in some stars. The astrophysical implications of our findings are briefly discussed. We have observed several Am and Hg-Mn stars, finding no evidence of magnetic fields.