First Overtone CO Bands in the Giant Component of RS Ophiuchi: the 12C/13C Ratio in 2008

A. Evans (Keele Univ); B. Kaminsky (MAO); Charles E. Woodward (Minnesota Univ); M.T. Rushton (Lancashire Univ); Ya. V. Pavlenko (MAO)

arxiv: 1001.1668 · v1 · pith:XXKPEKTVnew · submitted 2010-01-11 · 🌌 astro-ph.SR

First Overtone CO Bands in the Giant Component of RS Ophiuchi: the 12C/13C Ratio in 2008

Ya. V. Pavlenko (MAO) , Charles E. Woodward (Minnesota Univ) , M.T. Rushton (Lancashire Univ) , B. Kaminsky (MAO) , A. Evans (Keele Univ) This is my paper

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keywords bandsfirstgiantovertoneratiosecondaryanalysisaround

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We present an analysis of a high resolution (R = 40000) infrared spectrum of the RS Oph secondary around the first overtone CO bands, obtained in 2008 May on the Gemini South 8 m. The 12CO and 13CO bands are well-resolved, and we compute synthetic spectra to determine the 12C/13C ratio. We find 12C/13C = 16 +/- 3, consistent with the interpretation of the secondary as red giant which has evolved beyond the first drege-up phase of evolution.

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First Overtone CO Bands in the Giant Component of RS Ophiuchi: the 12C/13C Ratio in 2008

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