QU Carinae: Supernova Ia in the making?

Abstract

Variable NaI 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 (Patat et al. 2007). 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 NaI absorption, and SNIa. This thread not only provides insight into the spectral peculiarities of QU Car, but also links SNeIa as a class with their parent systems.

Accepted for publication to MNRAS. 23 pages (4 figures, 3 tables)

References in corpus (7)

• Circumstellar Material in Type Ia Supernovae via Sodium Absorption Features
• Variable Sodium Absorption in a Low-Extinction Type Ia Supernova
• Young and Massive Binary Progenitors of Type Ia Supernovae and Their Circumstellar Matter
• Transient Heavy Element Absorption Systems in Novae: Episodic Mass Ejection from the Secondary Star
• Constraints on Circumstellar Material Around the Type Ia Supernova 2007af
• Synthetic Spectrum Constraints on a Model of the Cataclysmic Variable QU Carinae
• QU Carinae: a SNeIa progenitor?

Cited by in corpus (7)

• Observational clues to the progenitors of Type-Ia supernovae
• Cataclysmic Variables from the Catalina Real-time Transient Survey
• One thousand cataclysmic variables from the Catalina Real-time Transient Survey
• The SW Sex enigma
• Novalike Cataclysmic Variables in the Infrared
• The orbital period of the V Sge star candidate QU Carinae
• The confirmation and revision on the orbital period change of the possible type Ia supernova progenitor V617 Sagittarii