Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-09-23
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
4 pages, 4 figures, accepted in Astrophysics and Space Science (24/02/2010), Special issue Hot sudbwarf stars
Scientific paper
We started a program to construct several grids of suitable model atmospheres and synthetic spectra for hot subdwarf O stars computed, for comparative purposes, in LTE, NLTE, with and without metals. For the moment, we use our grids to perform fits on our spectrum of SDSS J160043.6+074802.9 (J1600+0748 for short), this unique pulsating sdO star. Our best fit is currently obtained with NLTE model atmospheres including carbon, nitrogen and oxygen in solar abundances, which leads to the following parameters for SDSS J1600+0748 : Teff = 69 060 +/- 2080 K, log g = 6.00 +/- 0.09 and log N(He)/N(H) = -0.61 +/- 0.06. Improvements are needed, however, particularly for fitting the available He II lines. It is hoped that the inclusion of Fe will help remedy the situation.
Brassard Pierre
Chayer Pierre
Fontaine Gérard
Green Elizabeth M.
Latour M.
No associations
LandOfFree
A NLTE model atmosphere analysis of the pulsating sdO star SDSS J1600+0748 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A NLTE model atmosphere analysis of the pulsating sdO star SDSS J1600+0748, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A NLTE model atmosphere analysis of the pulsating sdO star SDSS J1600+0748 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-182297