Sakurai's Object: characterising the near-infrared CO ejecta between 2003 and 2007

Details Sakurai's Object: characterising the near-infrared CO ejecta between 2003 and 2007 Sakurai's Object: characterising the near-infrared CO ejecta between 2003 and 2007

2008-10-24

arxiv.org/abs/0810.4556v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, 2 tables

Scientific paper

We present observations of Sakurai's Object obtained at 1-5um between 2003 and 2007. By fitting a radiative transfer model to an echelle spectrum of CO fundamental absorption features around 4.7um, we determine the excitation conditions in the line-forming region. We find 12C/13C~3.5, consistent with CO originating in ejecta processed by the very late thermal pulse, rather than in the pre-existing planetary nebula. We demonstrate the existence of 2.2e-6

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