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

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        902257.pdf (PDF, 154Kb)
        Author
        Briggs, K.R.
        Napiwotzki, R.
        Maxted, P.F.L.
        Wheatley, P.J.
        Attention
        2299/2145
        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.
        Publication date
        2007
        Published in
        In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372
        Other links
        http://hdl.handle.net/2299/2145
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