THE WEAK MAGNETIC-FIELD OF THE AP STAR EPSILON-URSAE-MAJORIS

被引：16

作者：

BOHLENDER, DA

LANDSTREET, JD

机构：

[1] Department of Astronomy, University of Western Ontario, London

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 358卷 / 01期

关键词：

Stars: individual (∈ UMa); Stars: magnetic; Stars: peculiar A;

D O I：

10.1086/185771

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

High signal-to-noise ratio circular polarization measurements in the wings of Hβ have been obtained for the bright A0pCr star ∈ UMa, throughout its 5d.0887 rotation period. These data suggest that ∈ UMa possesses an approximately dipolar magnetic field with magnetic extrema of +128 and -64 G. If the inclination of the rotation axis of the star is in the range i = 65° ± 15°, then the obliquity of the magnetic field axis to the rotation axis is between 19° and 84°. The observations are compared with recent Doppler imaging studies of the surface abundances of ∈ UMa.

引用

页码：L25 / L28

页数：4

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