CO bands in V4334 Sgr (Sakurai's Object): the 12C/13C ratio

Ya. V. Pavlenko , T. R. Geballe , A. Evans , B. Smalley , S. P. S. Eyres , V. H. Tyne , L.A. Yakovina

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classification 🌌 astro-ph

keywords bandsobjectv4334ratiosakuraianalysisaroundatmosphere

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We present the results of our analysis of a high resolution (R ~ 30000) infrared spectrum of V4334 Sgr (Sakurai's Object) around the first overtone CO bands, obtained in 1998 July. The 12CO and 13CO bands are well-resolved, and we compute synthetic hydrogen-deficient model atmosphere spectra to determine the 12C/13C ratio. We find 12C/13C ~ 4 +/-1, consistent with the interpretation of V4334 Sgr as an object that has undergone a very late thermal pulse.

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CO bands in V4334 Sgr (Sakurai's Object): the 12C/13C ratio

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