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.
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页码：29 / 33
页数：5
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