CO bands in V4334 Sgr (Sakurai's Object): The

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

Open link

Publication date

March 2004

DOI

10.1051/0004-6361:20040078

Publisher

EDP Sciences

Abstract

We present the results of our analysis of a high resolution ($R\simeq30\,000$) 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 $\simeq$ 4 ± 1, consistent with the interpretation of V4334 Sgr as an object that has undergone a very late thermal pulse