Astronomy

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Browsing Astronomy by Subject "cataclysmic variables"

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    QU Carinae: Type Ia supernova in the making?
    (Oxford University Press on behalf of the Royal Astronomical Society, 2012) Kafka, S.; Honeycutt, R.K.; Williams, R.
    Variable Na I absorption lines have been reported in a number of Type Ia supernovae (SNeIa). The presence of this circumstellar material suggests that cataclysmic variables (CVs) with a giant donor star may be the progenitors of these SNeIa. We present echelle spectra of the CV QU Carinae which strengthen the connection between CVs of the V Sge class, the accretion wind evolution scenario, variable wind features, variable Na I absorption and SNeIa. This thread not only provides insight into the spectral peculiarities of QU Car, but also links SNeIa as a class with their parent systems.