Journal Article

QU Carinae: Type Ia supernova in the making?

S. Kafka, R. K. Honeycutt and R. Williams

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 425, issue 2, pages 1585-1590
Published in print September 2012 | ISSN: 0035-8711
Published online September 2012 | e-ISSN: 1365-2966 | DOI:
QU Carinae: Type Ia supernova in the making?

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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.

Keywords: novae, cataclysmic variables; supernovae: general

Journal Article.  4484 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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