Models of infrared spectra of Sakurai's Object (V4334 Sgr) in 1997

Details Models of infrared spectra of Sakurai's Object (V4334 Sgr) in 1997 Models of infrared spectra of Sakurai's Object (V4334 Sgr) in 1997

2002-05-30

arxiv.org/abs/astro-ph/0205528v1

Astronomy and Astrophysics

Astrophysics

6 pages, 7 eps figs, accepted for AA

Scientific paper

10.1051/0004-6361:20020732

Theoretical spectral energy distributions computed for a grid of hydrogen-deficient and carbon-rich model atmospheres have been compared with the observed infrared (1--2.5 $\mu$m) spectra of V4334 Sgr (Sakurai's Object) on 1997 April 21 and July 13. The comparison yields an effective temperature of \Tef = 5500 $\pm$ 200 K for the April date and \Tef = 5250 $\pm$ 200 K for July. The observed spectra are well fitted by Asplund et al. (1999) abundances, except that the carbon abundance is higher by 0.3 dex. Hot dust produces significant excess continuum at the long wavelength ends of the 1997 spectra. \keywords{Stars: individual: V4334 Sgr (Sakurai's Object) -- Stars: AGB and post-AGB evolution -- Stars: model atmospheres -- Stars: energy distributions -- Stars: effective temperatures}

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