Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-12-16
ASP Conf.Ser. 304 (2003) 35
Astronomy and Astrophysics
Astrophysics
6 pages, 2 figures; to be published in "CNO in the Universe", ASP Conf. Series, eds. C. Charbonnel, D. Schaerer & G. Meynet
Scientific paper
Accurate atomic data have become available in the recent past due to the demands of astrophysics and fusion research. We report on the impact of such data on non-LTE line-formation calculations for CNO in early-type stars. Considerable improvement is achieved by the derivation of consistent results from practically all available spectroscopic indicators, regardless of ionization stage or spin system, and the uncertainties in the analyses are drastically reduced. Moreover, systematic trends are revealed, e.g. an increase of the NI abundances from previous studies of BA-type supergiants by a factor of two is indicated. The present work promises stringent observational constraints on chemical mixing in the course of massive star evolution. First results on BA-type supergiants in the Galaxy and the Magellanic Clouds are discussed.
Becker Sylvia R.
Butler Keith
Kudritzki Rolf Peter
Przybilla Norbert
No associations
LandOfFree
Non-LTE line-formation for CNO 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 Non-LTE line-formation for CNO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-LTE line-formation for CNO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-258563