EDP Sciences
Free access
Volume 367, Number 3, March I 2001
Page(s) 933 - 938
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010067

A&A 367, 933-938 (2001)
DOI: 10.1051/0004-6361:20010067

Research Note The spectrum of V4334 Sgr (Sakurai's object) in August, 1998

Ya. V. Pavlenko1, 2 and H. W. Duerbeck3

1  Main Astronomical Observatory of Academy of Sciences of Ukraine, Golosiiv woods, Kyiv-127, 03680, Ukraine
2  Isaac Newton Institute of Chile, Kiev Branch, Chile
3  WE/OBSS, Free University Brussels (VUB), Pleinlaan 2, 1050 Brussels, Belgium
    e-mail: hduerbec@vub.ac.be

(Received 23 October 2000 / Accepted 10 January 2001)

Theoretical spectral energy distributions are computed for a grid of hydrogen-deficient and carbon-rich model atmospheres with a range in $T_{\rm eff}$ of 4000-5500 K and $\log g$ of 1.0-0.0, using the technique of opacity sampling, and taking into account continuous, atomic line and molecular band absorption. The energy distributions are compared with the spectrum of V4334 Sgr (Sakurai's object) of August 12, 1998 in the wavelength interval 300-1000 nm. This comparison yields an effective temperature of V4334 Sgr of $T_{\rm eff}= 5250\pm 200 \rm K$, and a value for the interstellar plus circumstellar reddening of $E_{B-V}= 1.3\pm 0.1$.

Key words: stars: individual: V4334 Sgr -- stars: AGB and post-AGB -- stars: fundamental parameters

Offprint request: Ya.V. Pavlenko, yp@mao.kiev.ua

SIMBAD Objects in preparation

© ESO 2001