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Event Date and Time
Location
ZOOM
Speaker
John D Landstreet, University of Western Ontario
Host
Shultz
About 95% of the stars in the Milky Way that have completed their active evolution have become white dwarfs. The white dwarfs within a fixed volume around the Sun provide a direct sample of the results of this global process, which can be exploited to test models of galactic evolution, and to improve our understanding of the many physical processes involved in stellar evolution. Stefano Bagnulo and I have just finished a complete survey of magnetic fields of the ≈ 150 white dwarfs within 20 pc of the Sun, and have shown that more than 20% of them have magnetic fields! The fields range in strength between tens of kG and hundreds of MG. This result has important implications for our understanding of how stellar magnetic fields originate and evolve.