Kilo-Gauss Magnetic Fields in Three DA White Dwarfs

R. Aznar Cuadrado; S. Jordan; R. Napiwotzki; H.M. Schmid; S.K. Solanki; G. Mathys

Kilo-Gauss Magnetic Fields in Three DA White Dwarfs

R. Aznar Cuadrado
, S. Jordan
, R. Napiwotzki
, H.M. Schmid
, S.K. Solanki
, G. Mathys

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

We have detected longitudinal magnetic fields between 2 and 4 kG in three normal DA white dwarfs (WD0446¡790, WD1105¡048, WD2359¡434) out of a sample of 12 by using optical spectropolarimetry done with the VLT Antu 8 m telescope equipped with FORS1. With the exception of 40 Eri B (4 kG) these are the first positive detections of magnetic fields in white dwarfs below 30 kG. A detection rate of 25 % (3/12) may indicate now for the first time that a substantial fraction of white dwarfs have weak magnetic fields. This result, if confirmed by future observations, would form a cornerstone for our understanding of the evolution of stellar magnetic fields.

Original language	English
Title of host publication	In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334
Publisher	Astronomical Society of the Pacific
Pages	159-164
ISBN (Print)	1-58381-197-4, 978-1-58381-268-6
Publication status	Published - 2005

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@inproceedings{7e5724446c6148ee963e4640674e463e,

title = "Kilo-Gauss Magnetic Fields in Three DA White Dwarfs",

abstract = "We have detected longitudinal magnetic fields between 2 and 4 kG in three normal DA white dwarfs (WD0446¡790, WD1105¡048, WD2359¡434) out of a sample of 12 by using optical spectropolarimetry done with the VLT Antu 8 m telescope equipped with FORS1. With the exception of 40 Eri B (4 kG) these are the first positive detections of magnetic fields in white dwarfs below 30 kG. A detection rate of 25 \% (3/12) may indicate now for the first time that a substantial fraction of white dwarfs have weak magnetic fields. This result, if confirmed by future observations, would form a cornerstone for our understanding of the evolution of stellar magnetic fields.",

author = "\{Aznar Cuadrado\}, R. and S. Jordan and R. Napiwotzki and H.M. Schmid and S.K. Solanki and G. Mathys",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/328.html--Copyright Astronomical Society of the Pacific",

year = "2005",

language = "English",

isbn = "1-58381-197-4",

pages = "159--164",

booktitle = "In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334",

publisher = "Astronomical Society of the Pacific",

address = "United States",

}

TY - GEN

T1 - Kilo-Gauss Magnetic Fields in Three DA White Dwarfs

AU - Aznar Cuadrado, R.

AU - Jordan, S.

AU - Napiwotzki, R.

AU - Schmid, H.M.

AU - Solanki, S.K.

AU - Mathys, G.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/328.html--Copyright Astronomical Society of the Pacific

PY - 2005

Y1 - 2005

N2 - We have detected longitudinal magnetic fields between 2 and 4 kG in three normal DA white dwarfs (WD0446¡790, WD1105¡048, WD2359¡434) out of a sample of 12 by using optical spectropolarimetry done with the VLT Antu 8 m telescope equipped with FORS1. With the exception of 40 Eri B (4 kG) these are the first positive detections of magnetic fields in white dwarfs below 30 kG. A detection rate of 25 % (3/12) may indicate now for the first time that a substantial fraction of white dwarfs have weak magnetic fields. This result, if confirmed by future observations, would form a cornerstone for our understanding of the evolution of stellar magnetic fields.

AB - We have detected longitudinal magnetic fields between 2 and 4 kG in three normal DA white dwarfs (WD0446¡790, WD1105¡048, WD2359¡434) out of a sample of 12 by using optical spectropolarimetry done with the VLT Antu 8 m telescope equipped with FORS1. With the exception of 40 Eri B (4 kG) these are the first positive detections of magnetic fields in white dwarfs below 30 kG. A detection rate of 25 % (3/12) may indicate now for the first time that a substantial fraction of white dwarfs have weak magnetic fields. This result, if confirmed by future observations, would form a cornerstone for our understanding of the evolution of stellar magnetic fields.

M3 - Conference contribution

SN - 1-58381-197-4

SN - 978-1-58381-268-6

SP - 159

EP - 164

BT - In: Procs of the 14th European Workshop on White Dwarfs - ASP Conference Series 334

PB - Astronomical Society of the Pacific

ER -

Kilo-Gauss Magnetic Fields in Three DA White Dwarfs

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