On the nature of the magnetic DB white dwarfs

被引：10

作者：

Wickramasinghe, DT ^{[1
]}

Schmidt, G

Ferrario, L

Vennes, S

机构：

[1] Australian Natl Univ, Dept Math, Canberra, ACT, Australia

[2] Univ Illinois, Dept Astron, Urbana, IL 61801 USA

[3] Univ Arizona, Steward Observ, Tucson, AZ USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2002年 / 332卷 / 01期

关键词：

magnetic fields; stars : individual : GD 229; stars : individual : HE 1211-1707; stars : individual : HE 1043-0502; white dwarfs;

D O I：

10.1046/j.1365-8711.2002.05264.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use recent calculations of the Zeeman splitting of neutral helium lines and atmospheric models to investigate the properties of the magnetic DB white dwarfs in the field range 10-1000 MG. We confirm that GD 229 exhibits spectroscopic signatures indicative of neutral helium in a magnetic field of similar to500 MG, and argue that HE 1043-0502 may also be helium rich with an even higher field of similar to750 MG. The dominant features in the phase-averaged spectrum of the polarized magnetic white dwarf HE 1211-1707 correspond with those of Zeeman split neutral helium lines in a mean field of similar to50 MG, while the observed spectral variations point to a non-dipolar field structure.

引用

页码：29 / 33

页数：5

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