On the incidence of weak magnetic fields in DA white dwarfs

  title={On the incidence of weak magnetic fields in DA white dwarfs},
  author={John D. Landstreet and Stefano Bagnulo and G. Valyavin and Luca Fossati and Stefan Jordan and Dmitry Monin and Gregg A. Wade},
  journal={Astronomy and Astrophysics},
Context. About 10 % of white dwarfs have magnetic fields with strength i n the range between about 10 5 and 5 10 8 G. It is not known whether the remaining white dwarfs are not magnetic, or if they have magnetic fields too weak to be detected with the techni ques adopted in the large surveys. Information is particularly l acking for the cooler (and generally fainter) white dwarfs. Aims. We describe the results of the first survey specifically devis ed to clarify the detection frequency of kG… 

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