Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 429, Issue 4, Pages 2934-2944Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts522
Keywords
stars: magnetic field; white dwarfs
Categories
Funding
- CNPq
- FAPERGS - Pronex - Brazil
- Austrian Fonds zur Forderung der wissenschaftlichen Forschung [P 21830-N16]
- MICINN [AYA08-1839/ESP]
- ESF EUROCORES Program EuroGENESIS (MICINN) [EUI2009-04170]
- Generalitat de Catalunya [2009SGR315]
- EU-FEDER funds
- US National Science Foundation [AST-0909107]
- Norman Hackerman Advanced Research Program [003658-0252-2009]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- Austrian Science Fund (FWF) [P 21830] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0909107] Funding Source: National Science Foundation
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To obtain better statistics on the occurrence of magnetism among white dwarfs, we searched the spectra of the hydrogen atmosphere white dwarf stars (DAs) in the Data Release 7 of the Sloan Digital Sky Survey (SDSS) for Zeeman splittings and estimated the magnetic fields. We found 521 DAs with detectable Zeeman splittings, with fields in the range from around 1 to 733 MG, which amounts to 4 per cent of all DAs observed. As the SDSS spectra have low signal-to-noise ratios, we carefully investigated by simulations with theoretical spectra how reliable our detection of magnetic field was.
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