Magnetic white dwarf stars in the Sloan Digital Sky Survey

  title={Magnetic white dwarf stars in the Sloan Digital Sky Survey},
  author={S. O. Kepler and Ingrid Pelisoli and Stefan Jordan and Scott J. Kleinman and Baybars Kulebi and Detlev Koester and Viviane Peccanha and B{\'a}rbara Garcia Castanheira and Atsuko Nitta and Jos'e Eduardo da Silveira Costa and D. E. Winget and A. Kanaan and Luciano Sturmer de Fraga},
  journal={Monthly Notices of the Royal Astronomical Society},
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 MG to 733 MG, which amounts to 4% of all DAs observed. As the SDSS spectra has low signal-to-noise ratios, we carefully investigated by… Expand
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