Magnetic White Dwarfs with Debris Disks

Kuelebi B., Eksi K. Y., Loren-Aguilar P., Isern J., Garcia-Berro E.

18th European White Dwarf Workshop, EUROWD12, Krakow, Poland, 13 - 17 August 2012, vol.469, pp.417-419 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 469
  • City: Krakow
  • Country: Poland
  • Page Numbers: pp.417-419
  • Istanbul Technical University Affiliated: Yes


It has long been accepted that a possible mechanism for explaining the existence of magnetic white dwarfs is the merger of a binary white dwarf system, as there are viable mechanisms for producing sustainable magnetism within the merger product. However, the lack of rapid rotators in the magnetic white dwarf population has been always considered a problematic issue of this scenario. In order to explain this discrepancy we build a model in which the interaction between the magnetosphere of the star and the disk induces angular momentum transfer. Our model predicts that the magnetospheric interaction of magnetic white dwarfs with their disks results in a significant spin down, and we show that the observed rotation period of RE J 0317-853, which is suggested to be a product of a double degenerate merger, can be reproduced.