On the nature of the magnetic DB white dwarfs

D. T. Wickramasinghe; Gary Schmidt; Lilia Ferrario; S. Vennes

doi:10.1046/j.1365-8711.2002.05264.x

On the nature of the magnetic DB white dwarfs

D. T. Wickramasinghe^*, Gary Schmidt, Lilia Ferrario, S. Vennes

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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 ∼500 MG, and argue that HE 1043-0502 may also be helium rich with an even higher field of ∼750 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 ∼50 MG, while the observed spectral variations point to a non-dipolar field structure.

Original language	English
Pages (from-to)	29-33
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	332
Issue number	1
DOIs	https://doi.org/10.1046/j.1365-8711.2002.05264.x
Publication status	Published - 1 May 2002

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10.1046/j.1365-8711.2002.05264.x

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title = "On the nature of the magnetic DB white dwarfs",

abstract = "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 ∼500 MG, and argue that HE 1043-0502 may also be helium rich with an even higher field of ∼750 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 ∼50 MG, while the observed spectral variations point to a non-dipolar field structure.",

keywords = "Magnetic fields, Stars: Individual: GD 229, Stars: Individual: HE 1043-0502, Stars: Individual: HE 1211-1707, White dwarfs",

author = "Wickramasinghe, \{D. T.\} and Gary Schmidt and Lilia Ferrario and S. Vennes",

year = "2002",

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doi = "10.1046/j.1365-8711.2002.05264.x",

language = "English",

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pages = "29--33",

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TY - JOUR

T1 - On the nature of the magnetic DB white dwarfs

AU - Wickramasinghe, D. T.

AU - Schmidt, Gary

AU - Ferrario, Lilia

AU - Vennes, S.

PY - 2002/5/1

Y1 - 2002/5/1

N2 - 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 ∼500 MG, and argue that HE 1043-0502 may also be helium rich with an even higher field of ∼750 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 ∼50 MG, while the observed spectral variations point to a non-dipolar field structure.

AB - 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 ∼500 MG, and argue that HE 1043-0502 may also be helium rich with an even higher field of ∼750 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 ∼50 MG, while the observed spectral variations point to a non-dipolar field structure.

KW - Magnetic fields

KW - Stars: Individual: GD 229

KW - Stars: Individual: HE 1043-0502

KW - Stars: Individual: HE 1211-1707

KW - White dwarfs

UR - https://www.scopus.com/pages/publications/0041346571

U2 - 10.1046/j.1365-8711.2002.05264.x

DO - 10.1046/j.1365-8711.2002.05264.x

M3 - Article

SN - 0035-8711

VL - 332

SP - 29

EP - 33

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

On the nature of the magnetic DB white dwarfs

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