| Issue |
A&A
Volume 417, Number 3, April III 2004
|
|
|---|---|---|
| Page(s) | L39 - L43 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20040078 | |
| Published online | 26 March 2004 | |
Letter to the Editor
CO bands in V4334 Sgr (Sakurai's Object): The 
C/
C ratio
1
Main Astronomical Observatory, Academy of Sciences of the Ukraine, Golosiiv Woods, Kyiv-127, 03680 Ukraine
2
Gemini Observatory, 670 N. A'ohoku Place, Hilo, Hi 96720, USA
3
Astrophysics Group, School of Chemistry & Physics, Keele University, Keele Staffordshire, ST5 5BG, UK
4
Centre for Astrophysics, University of Central Lancashire, Preston, Lancashire PR1 2HE, UK
Corresponding author: Ya. V. Pavlenko, yp@mao.kiev.ua
Received:
19
January
2004
Accepted:
26
February
2004
We present the results of our analysis of a high resolution
(
) 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.
Key words: stars: individual: V4334 Sqr / stars: individual: Sakurai's Object / stars: atmospheric parameters / stars: abundances
© ESO, 2004
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