Mass-radius relation for magnetic white dwarfs

In Saeng Suh; G. J. Mathews

doi:10.1086/308403

Mass-radius relation for magnetic white dwarfs

In Saeng Suh, G. J. Mathews

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Abstract

Recently, several white dwarfs with very strong surface magnetic fields have been observed. In this paper we explore the possibility that such stars could have sufficiently strong internal fields to alter their structure. We obtain a revised white dwarf mass-radius relation in the presence of strong internal magnetic fields. We first derive the equation of state for a fully degenerate ideal electron gas in a magnetic field using an Euler-MacLaurin expansion. We use this to obtain the mass-radius relation for magnetic ⁴He, ¹²C, and ⁵⁶Fe white dwarfs of uniform composition.

Original language	English
Pages (from-to)	949-954
Number of pages	6
Journal	Astrophysical Journal
Volume	530
Issue number	2 PART 1
DOIs	https://doi.org/10.1086/308403
State	Published - Feb 20 2000
Externally published	Yes

Keywords

Stars: interiors
Stars: magnetic fields
White dwarfs

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10.1086/308403

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abstract = "Recently, several white dwarfs with very strong surface magnetic fields have been observed. In this paper we explore the possibility that such stars could have sufficiently strong internal fields to alter their structure. We obtain a revised white dwarf mass-radius relation in the presence of strong internal magnetic fields. We first derive the equation of state for a fully degenerate ideal electron gas in a magnetic field using an Euler-MacLaurin expansion. We use this to obtain the mass-radius relation for magnetic 4He, 12C, and 56Fe white dwarfs of uniform composition.",

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N2 - Recently, several white dwarfs with very strong surface magnetic fields have been observed. In this paper we explore the possibility that such stars could have sufficiently strong internal fields to alter their structure. We obtain a revised white dwarf mass-radius relation in the presence of strong internal magnetic fields. We first derive the equation of state for a fully degenerate ideal electron gas in a magnetic field using an Euler-MacLaurin expansion. We use this to obtain the mass-radius relation for magnetic 4He, 12C, and 56Fe white dwarfs of uniform composition.

AB - Recently, several white dwarfs with very strong surface magnetic fields have been observed. In this paper we explore the possibility that such stars could have sufficiently strong internal fields to alter their structure. We obtain a revised white dwarf mass-radius relation in the presence of strong internal magnetic fields. We first derive the equation of state for a fully degenerate ideal electron gas in a magnetic field using an Euler-MacLaurin expansion. We use this to obtain the mass-radius relation for magnetic 4He, 12C, and 56Fe white dwarfs of uniform composition.

KW - Stars: interiors

KW - Stars: magnetic fields

KW - White dwarfs

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DO - 10.1086/308403

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VL - 530

SP - 949

EP - 954

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 1

ER -

Mass-radius relation for magnetic white dwarfs

Abstract

Keywords

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