CYCLOTRON HUMPS IN AM HER SYSTEMS .4. VARIATIONS AROUND THE ORBIT IN MR SER

被引：17

作者：

WICKRAMASINGHE, DT ^{[1
]}

CROPPER, M ^{[1
]}

MASON, KO ^{[1
]}

GARLICK, M ^{[1
]}

机构：

[1] AUSTRALIAN NATL UNIV,FAC SCI,DEPT MATH,CANBERRA,ACT 2601,AUSTRALIA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1991年 / 250卷 / 04期

关键词：

D O I：

10.1093/mnras/250.4.692

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present phase-resolved spectroscopy of MR Ser in which cyclotron harmonics are evident. These move with viewing angle. Asymmetries in the movement and profiles of the humps indicate that the cyclotron remission region is extended. We have modelled this region to deduce a magnetic field of 24.5 +/- 0.5 MG. We also observe halo Zeeman absorption features which yield a similar field, confirming that the two emission regions are closely associated. Photospheric Zeeman features yield a polar field of 26 MG (assuming a centred dipole) consistent with the field in the cyclotron and halo emission regions if these are some 20-degrees from the magnetic pole.

引用

页码：692 / 700

页数：9

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