The Massive CO White Dwarf in the Symbiotic Recurrent Nova RS Ophiuchi

Abstract

If accreting white dwarfs (WD) in binary systems are to produce type Ia supernovae (SNIa), they must grow to nearly the Chandrasekhar mass and ignite carbon burning. Proving conclusively that a WD has grown substantially since its birth is a challenging task. Slow accretion of hydrogen inevitably leads to the erosion, rather than the growth of WDs. Rapid hydrogen accretion does lead to growth of a helium layer, due to both decreased degeneracy and the inhibition of mixing of the accreted hydrogen with the underlying WD. However, until recently, simulations of helium-accreting WDs all claimed to show the explosive ejection of a helium envelope once it exceeded $\sim 10^{-1}{\mathrm{M}}_{\odot }$. Because CO WDs cannot be born with masses in excess of $\sim 1.1{\mathrm{M}}_{\odot }$, any such object, in excess of $\sim 1.2{\mathrm{M}}_{\odot }$, must have grown substantially. We demonstrate that the WD in the symbiotic nova RS Oph is in the mass range 1.2-1.4\,M${}_{\odot }$. We compare UV spectra of RS Oph with those of novae with ONe WDs, and with novae erupting on CO WDs. The RS Oph WD is clearly made of CO, demonstrating that it has grown substantially since birth. It is a prime candidate to eventually produce an SNIa.

9 pages, 3 figures, submitted to ApJ

References in corpus (10)

• X-Ray Emitting Blast Wave from the Recurrent Nova RS Ophiuchi
• The Super-Soft X-ray Phase of Nova RS Ophiuchi 2006
• i-process nucleosynthesis and mass retention efficiency in He-shell flash evolution of rapidly accreting white dwarfs
• He-Accreting WDs: accretion regimes and final outcomes
• Spectroscopic orbits and variations of RS Oph
• Shortest Recurrence Periods of Novae
• Recurrent Novae in M31
• Metallicity and effective temperature of the secondary of RS Oph
• Chemical abundance analysis of 13 southern symbiotic giants from high-resolution spectra at ~1.56 μm
• Abundance analysis of the recurrent nova RS Ophiuchi (2006 outburst)

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• Chandra High Energy Transmission Gratings Spectra of V3890 Sgr
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• Gamma-Ray Light Curves and Spectra of Classical Novae
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• The Formation of Electron-capture Supernovae: A Review
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