Testing Magnetic Braking: The X-ray Activity of M Dwarfs in Pre-Cataclysmic Variable Systems

K.R. Briggs, R. Napiwotzki, P.F.L. Maxted, P.J. Wheatley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Angular momentum loss by magnetic braking is believed to be an important mechanism in the evolution of tidally-locked white dwarf (WD) bina- ries. We measure the X-ray emission of a sample of M dwarfs in pre-cataclysmic variable systems to examine for the first time, if the magnetic activity of sec- ondary stars in tidally-locked white dwarf binaries is the same as that of their sin- gle main-sequence counterparts. Our results support the extrapolation of mag- netic braking prescriptions derived from single main-sequence stars to tidally- locked WD binaries, and therefore support recent results that indicate magnetic braking plays a smaller role than previously proposed.
Original languageEnglish
Title of host publicationIn: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372
PublisherAstronomical Society of the Pacific
Pages497-500
ISBN (Print)978-1-58381-239-6, 978-1-58381-306-5
Publication statusPublished - 2007

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